Datenblatt für LP55231 Eval Board User Guide von Texas Instruments

Datenblatt - Kommentare/Fehler melden

i TEXAS INSTRUMENTS

Using the LP55231 Evaluation Kit

User's Guide

Literature Number: SNVU214B

April 2013–Revised December 2015

All trademarks are the property of their respective owners.

l TEXAS INSTRUMENTS httg://www.gsgad.com/ www.ﬂdichig.ccm.

User's Guide

SNVU214B–April 2013–Revised December 2015

The LP55231 Evaluation Kit

This document describes how to get the LP55231 evaluation board up and running, how to use evaluation

and programming software, and how to get started with programming. The application note is divided into

four separate sections: General Description provides general information for getting started with the

LP55231 evaluation hardware and software. LP55231 Programming shows LP55231 programming flow.

Instruction Set Details gives a detailed description of the device’s instruction set. Finally, Programming

Examples gives practical programming examples.

General Description

The LP55231 provides flexibility and programmability for dimming and sequencing control. Each LED can

be controlled directly and independently through the serial bus (in other words, without programming the

engines), or LED drivers can be controlled by programming the execution engines. The LP55231 has

three independent program execution engines, so it is possible to form three independently programmable

LED banks. LED drivers can be grouped based on their function so that, for example, the first bank of

drivers can be assigned to the keypad illumination, the second bank to the “funlights” and the third group

to the indicator LED(s). Each bank can contain 1 to 9 LED driver outputs. Instructions for program

execution engines are stored in the internal program memory. The total amount of the program memory is

96 instructons and the user can allocate the memory as required by the engines. The LP55231 is

programmed using an I2C-compatible serial bus. Of course, it is possible to write programs for the

LP55231 in the form of binary data, but the programming tools described in this document offers a more

convenient way to write (and read) the registers and the SRAM memory and to program the device.

REQUIREMENTS

The following are needed to get started:

• A text editor

• LP55231 evaluation kit hardware

• LP55231 evaluation software (LP55231.exe)

• LP55231 compiler (LASM.EXE)

• FTDI virtual com port drivers (VCP)

A text editor is used to create source code for the assembler. Here, we use PSPAd as a text editor, but

you should feel free to use whatever editor you're most comfortable with. PSPad is a freeware editor, ©

1991 - 2007 Jan Fiala. Please see the PSPad copyright notice. PSPad text editor can be downloaded

from http://www.pspad.com/

INSTALLING FTDI DRIVERS

The evaluation board has FTDI's FT232R USB to UART chip on it. FT232R allows the PC to see the

evaluation board as a virtual COM port. For this FTDI VCP drivers must be installed to the host computer.

Usually Windows can install the drivers automatically when the evaluation board is detected. If Windows

fails to install the drivers, they can be downloaded from www.ftdichip.com. Make sure that you download

and install VCP drivers and not the D2XX drivers.

Once FTDI drivers are installed, and the evaluation board is plugged into a USB port, Windows generates

an USB serial port. This port is given a unique COM port number. Note that the evaluation program polls

only the first 8 COM ports. If the evaluation program does not find the evaluation board you may need to

change the COM port number manually. In Windows go to the Control Panel, select System, select

Hardware tab, open Device Manager, select Ports and you should see the USB SerialPort number. If the

port number is above 8 it will need to be changed. Right-click the USB Serial Port, select Properties,

select Port Settings, click Advanced button, then select a COM port number between 1 to 8.

2The LP55231 Evaluation Kit SNVU214B–April 2013–Revised December 2015

Submit Documentation Feedback

l TEXAS INSTRUMENTS

www.ti.com

COPYING THE SOFTWARE

PSPad does not require installation; it can be simply unpacked into any directory. The archive contains

subdirectories and must be unpacked with subdirectory preservation enabled. Also copy the Lysti.ini –file

into the Syntax-folder of PSPad (for example C:\Program Files\PSPad editor\Syntax). Lysti.ini –file

contains customization information for the text editor, and it must be saved into the Syntax-folder.

The LP55231 assembler (LASM.exe) and LP55231 evaluation software can be copied to the PC’s hard

disk and run without installation. The following files also need to be copied: LP55231.exe, regmap.ini,

usblptio.dll, rtl60.bpl and LASM.exe. All the files must lie in the same directory. Also the source code files

which are created (*.scr) should be saved/placed in the same directory as the LASM.exe before calling the

assembler. Please avoid file names or directory names containing a space character, since the assembler

may fail when applied to file names containing a space character. The evaluation software runs under

Windows 2000/XP/Vista.

PSPAD CUSTOMIZATION

Once you run the PSPad editor, you should customize the editor for LP55231 as follows:

1. Select Settings menu > Highlighter settings.

2. Select Specification tab. See PSPad Highlighter Specification Settings for LP55231.

3. On the left (highlighter) list, click on one of bolded highlighters (marked with <not assigned> -tab).

4. On the right side is list of user highlighters, select the Lysti highlighter and click on it (see PSPad

Highlighter Specification Settings for LP55231). Click on ‘Apply’ to confirm this action.

Also set the compiler search path and parameters for the LASM.exe, as shown in PSPad compiler

settings for LP55231. Note: These variable names are all case-sensitive so, for example %File% will work,

but %file% and %FILE% will fail to produce the expected results. . You may need to replace the shown

filepath C:\LP55231\LASM\LASM.exe with your actual path. Tag the Capture Program Output Window as

shown in PSPad compiler settings for LP55231. Note: These variable names are all case-sensitive so, for

example %File% will work, but %file% and %FILE% will fail to produce the expected results. . Accept

highlighter settings by clicking ‘OK’. Finally, in the main window show the LOG window by pressing CTRL

+ L. All software needed should be now ready for writing and assembling the first program. Note: The

maximum length of a source code line is 140 characters. Lines that are longer than 140 are not

assembled correctly.

SNVU214B–April 2013–Revised December 2015 The LP55231 Evaluation Kit

l TEXAS INSTRUMENTS 9 MW A y W 7 y mm mm ﬂ m ﬂ w a W a ass a 5m 5mm a rcvrk g nx y W smusmu y usvasum ﬂ mm. a.“ ﬁ M a mm» _ 1 a.“ mm 1 u.“ mm 3 u.“ “w J (m. mm mm. mm.“ ‘ Ex‘m‘wmm [W m... Empnz‘usmmmm [:1 mm.“ um um :13 ml: r1: am. mum u SwnwFlu m. Emlann m WWW E1 Lam" Hum“ nunmwmnw m 4 III M. Mum me ml: um um mm. x: , um um

www.ti.com

PSPad Highlighter Specification Settings for LP55231

PSPad compiler settings for LP55231. Note: These variable names are all case-sensitive so, for example

%File% will work, but %file% and %FILE% will fail to produce the expected results.

HARDWARE SET-UP

LP55231 Evaluation Board

The LP55231 evaluation board has USB communication and evaluation-related components assembled

onto one board. (See LP55231 Evaluation Board.) The evaluation board was designed specially for

evaluation and therefore is not optimized for the smallest layout size. The components are physically large

to make changing of the value easy if needed. The LP55231 input voltage VDD is supplied from the USB

port or from an external voltage applied to the X4 connector.

4The LP55231 Evaluation Kit SNVU214B–April 2013–Revised December 2015

Submit Documentation Feedback

l TEXAS INSTRUMENTS

www.ti.com

LP55231 Evaluation Board (continued)

There are 7 pin connectors (jumpers) on the evaluation board for demonstrating some of the possible

application options (see LP55231 Evaluation Board). The voltage supplied to the VDD input of the device

can be selected using J2 connector. Connecting right and center pin with jumper selects that VDD is fed

from USB and connecting left and center pin with jumper selects that VDD is fed from connector X4. Also

whether VDDIO is powered from USB or from external voltage supply (X3 connector) can be selected with

J1. Connecting right and center pin with jumper selects that VDDIO is fed from USB and connecting left and

center pin with jumper selects that VDDIO is fed from connector X3. Voltage on the USB port is 5.0V and

the maximum current is 500 mA. There is a voltage regulator on the evaluation board which reduces the

USB bus voltage to 3.3V. Connector X4 upper connection point is for VDD and lower for Ground.

Connector X3 upper connection point is for VDDIO and lower for Ground.

Pin connectors J10, J11, J12 are used to select whether LP55231 LED outputs are connected to WLEDs

or RGBs. If lower and center pins are connected with jumper, J10 connects output 1 to D1 green, output 2

to D1 blue and output 7 to D1 red. If upper and center pins are connected with jumper output 1 is

connected to D4, output 2 to D5 and output 3 to D6. Pin connector J11 connects outputs 3 to D2 green,

output 4 to D2 blue, and output 8 to D2 red if lower and center pins connected with jumper. If upper and

center pins are connected with jumper output 4 is connected to D7, output 5 to D8, and output 6 to D9.

Pin connector J12 connects output 5 to D3 green, output 6 to D3 blue, and output 9 D3 red if lower and

center pins connected with jumper. If higher and center pins are connected with jumper output 5 is

connected to D10, output 8 to D11, and output 9 to D12. It is recommended that either RGB or white

LEDs are used and not mixed.

Pin connectors J13 and J14 are used to connect on-board light sensor to LP55231. If J14 connectors left

and center pins are connected with jumper light sensors output is connected to INT pin. If J14 connectors

right and center pins are connected with jumper INT pin is connected to D14 LED. If J13 connectors left

and center pins are connected with jumper light sensors GC1 pin is connected to LP55231 GPO pin. In

this case pulling GPO sets the light sensor into standby mode. If this function is not desired J13 can be

left open. Light sensor's GC1 pin is pulled high with R10. Jumper Options summarizes the available

options.

Jumper Options

Jumper # Left/Lower Pin Center Pin Right/Upper Pin

J1 VDDIO = external

VDDIO = 3.3V

J2 VBATT = external

VBATT = 3.3V

J10 RGB LED D1 in use (LED1 = G, LED2 = B, LED7 = R)

WLEDs in use (LED1 = D4, LED2 = D5, LED3 = D6)

J11 RGB LED D2 in use (LED3 = G, LED4 = B, LED8 = R)

WLEDs in use (LED4 = D7, LED5 = D8, LED6 = D9)

J12 RGB LED D3 in use (LED5 = G, LED6 = B, LED9 = R)

WLEDs in use (LED7 = D10, LED8 = D11, LED9 = D12)

J13 Light sensor GC1 pin connected to LP55231 GPO pin. GPO can be used to

disable light sensor.

Not needed. GC1 pulled up with R10 resistor.

J14 INT pin connected to light sensor output.

INT pin connected to D14 LED.

SNVU214B–April 2013–Revised December 2015 The LP55231 Evaluation Kit

l TEXAS INSTRUMENTS 4, . , . . . me 0472mm He‘v W "mm W“ 2 Mamaﬂm...‘ mamm‘ um‘ nnH mmmm x aw ENG‘NEENYRH nmnmm 7 17 EN PM 17 thalamus] W HEW 1' PM F Mmm: Raul \mmsa TH WAWWWWWWEWWWWWSE nnnnnnnn m WAWWWWWWEWWWWma nnnnnnnn madam M Dayan-Insert saw-m Yamvmalm: W MWWWSB mm a 32" r m r urr 2.5..“ WWWmWW: W uuWuYuN/urnsa WWWW WWWW r 33" 5 m r Ix ; gm [725 an r W D‘ EDNWDL “WWW ” 3‘" r 3"“ 5 ‘5“ r meV Exmnamnmc aw uzcuquL nnnnnnnn r as» r um r Aum r mm i A m mcuquL nnnnnnnn men 1..., D g R” W” W mmmm nnnnnnnn r: 5,," r 5| l DAM us EDNYRDL Man Man VEILH v 45! Vol F lam: 5' WWSVWH _ r 50m: W uncuquL unnnnnnn p SWMW N, r r cunhnuwxmsaxmsmsnl HEN D7 EUNYRUL nunnnnnn r W IN 4 m m u-cwm nunnnnnn “ “‘“W F Imam Vsmpsvalmscumpamahunmum: —nEH unanYRnL nnnnnnnn F cwmmum mem»:: 0 mm mm VHH m um um WWWW wmm ml “Se-ml r _ mm mm ”H unvw mama a Wm r INNER RD 1., ow VIN WW mama 4 m, m: M.,W.WW.,W.W VIN nuvw mama F m r M F 5°” W I? I: | w mum mama WWW W mum mama WW mm mm .LEDMIM in!“ an WW mu uuvw aaaaaaaa W Wcmlm W ch2|n1 cram r m —VEH nan/w common I“ m WHEN mm m‘ W WSYARVUPJUSY [NEINLBUSY y: MASKEUSV —IYH mum WWWWWWWW m WWW WW LED‘ hmzmozmm\Linsmnsmmmnamnsl TH mmw mm ’7 mm , IFH. x 2AM us cuwwzw mmuu ' , '7 Uvﬂelzwmzﬂ‘elz‘y TH mmw WWWWWWWW F Ranmrmmu “mm 204 mmm WWWWWWWW r “Emma“.m —:...W,. "A _| m mum WWWWWWWW - ZEN DVEURRENY mmuu "15“me ‘75 WR W W WWWWWWWW mm. (”H ENG‘NE‘ PE man man ND": 3 . . . XI‘I: TH mm»: nnnnnnnn r 1—]— [—n w «W Emma nnnnnnnn 3AM SYAYUSNNYERRUPY unannnn V nnH \MWEWMWNEWWW ‘nnnnnnnn \ | mm | ELM.“ | imp. |\ gym.“ | gym... m “mm \ «mm H a; \ Ru WWW usBoK 032157?

www.ti.com

CONNECTING EVALUATION BOARD TO COMPUTER

LP55231 Evaluation Software Control Panel

1. Check that the jumpers on the evaluation board are on wanted positions.

2. Connect the evaluation board to your computer using a USB cable.

3. If this is first time using the evaluation board, install FTDI's VCP drivers.

4. Start the evaluation software LP55231.exe.

5. Click Init USB button.

6. Reset the LP55231 circuit by clicking the Reset button on upper right corner of the window. In the

message box that appears, click OK to confirm the register reading.

7. The evaluation kit is now fully up and running, and the device can be controlled through the PC

software. LP55231 Evaluation Software Control Panel shows the evaluation software user interface

(Control Panel).

You should see USB OK message on the status bar (shown in the lower part of the window). If the USB

communication is not working correctly, shut down the evaluation software and unplug the USB cable.

Plug in the USB cable again and reset the evaluation board by pressing the on-board reset button (S1).

Wait about 5 seconds and repeat steps 4 to 6 above. If evaluation software is still unable to find evaluation

board, change the com port settings as described in chapter INSTALLING FTDI DRIVERS.

6The LP55231 Evaluation Kit SNVU214B–April 2013–Revised December 2015

Submit Documentation Feedback

l TEXAS INSTRUMENTS

www.ti.com

CONTROLLING EVALUATION BOARD FROM PC

The evaluation software provides read-write control over the registers within the LP55231. Bits can be set

from a logical ‘1’ to a logical ‘0’ or vice versa by a mouse click; for some settings there is also a slider

control provided. The evaluation software window is divided into two panels: control panel and indicator

panel (see LP55231 Evaluation Software Control Panel). The leftmost panel is the indicator panel, and it

shows the status of the LP55231 registers (excluding the program memory).

The rightmost panel is the control panel -- it is used to change the status of the registers, to program the

device, or to debug the program depending on the selected view. The view is selected by the tabs on the

top of the window. The Manual view appears when the evaluation software starts. The Manual view is

used to run the device "manually"; i.e., the program execution engines are not used. It contains also some

LP55231 basic settings, like serial bus address selection. In the next chapter the user is guided through

the Manual view and basic operations of the LP55231. The other views are Program, Code memory, and

History; these views are presented in LP55231 Programming covering programming of the LP55231.

Tip: The context-sensitive buttons in the lower part of the window can be used for direct Write/Read

operations of the registers. The target register is indicated by red cross and the target can be changed by

clicking on the desired register on the indicator panel.

DIRECT CONTROL

Enabling the Device and Starting the Charge Pump

The first step to start with the LP55231 is to enable the chip; tag the Chip enabled check box. At first it is

best to use the following settings: Clock internal and Charge pump gain 1.5x (see LP55231 Evaluation

Software Control Panel). At this point it is good to ensure the charge pump output voltage with the

LP55231 built-in LED error detection. To do this, select VOUT from the LED test drop-down menu and tag

Start conversion. Use the adjacent RD button to read the result: it should be around 4.5 volts. Also click

on the RD button on the Status/Interrupt section to verify that the internal clock is used (Ext clk indicator

light should be OFF), and that the LED test is done (LED test done indicator should be ON).

Setting the Led Current and PWM

The next step is to set the desired LED currents. This is done by Current slider. Set 5 mA current for

LED1, and set PWM to 50% = 7Fhex. You should have a green LED switched on now. Note: When the

Update immediately tag is set, the evaluation software will write the new settings immediately to the

LP55231 registers. Otherwise, click on the Update button.

The basic idea behind LP55231 operation is to first set the LED currents to the required level; after that

the current settings are not touched any more – all the fade-in and fade-out sections (ramps), and the

temperature compensation is done by PWM . Each LED has its own constant current output, and all the

outputs can be controlled independently. Thus LED pre-selection (matched LEDs) is not required, and this

kind of architecture supports also color control. The PWM, current, and temperature compensation

controls are organized under tabs labelled by LED1 to LED 9. Now, let’s set 5 mA current and 50% PWM

for LED2 and 3.5 mA current and 50% PWM for LED7. As a result, D1 on evaluation board should emit

white light.

Master Fader

The PWM of LED driver outputs can be controlled individually as described above; alternatively the drivers

can be grouped by function to provide a quick control. The LP55231 has three master fader registers, so it

is possible to form three master fader groups. To assign an LED to a group, use the Master Fader drop-

down menu. Select Group 1 for LEDs 1, 2, and 7. Now you can control all the three outputs with a single

master fader register. There is a Master fader slider provided on the right side of the control panel and

dragging the slider under tab labelled by 1 controls now LEDs 1, 2, and 7. Note that the initial PWM and

current for LEDs in a group needs to be set before using the master fader control, since master fader is

simply a multiplier, which acts on the PWM registers.

SNVU214B–April 2013–Revised December 2015 The LP55231 Evaluation Kit

l TEXAS INSTRUMENTS

www.ti.com

Logarithmic vs Linear PWM Response

Logarithmic response is used to give the impression of a linear light intensity increase/decrease as the

PWM duty cycle is raised/reduced. Logarithmic response is visually more pleasing especially when the

overall brightness is low. To activate the logarithmic response, tag logarithmic adjustment. Activate

logarithmic adjustment for LEDs 1, 2, and 7. Set also 5 mA current for LEDs 3 and 4, set 3.5mA for LED8.

Set 50% PWM for LEDs 3, 4, and 8. Assign LEDs 3, 4, and 8 to the master fader group 1 so that you can

control all the six LEDs with one slider. Now you should have logarithmic control over the LEDs 1, 2, 7

and linear control over the LEDs 3, 4, 8. To see the difference between the lin and log response, move the

slider backwards and forwards to alter the intensity of all the six LEDs at once.

Temperature Compensation

The LP55231 has a temperature compensation function to correct for variations in light intensity and color

caused by changes in ambient temperature.

Reset the LP55231 and start the charge pump as shown in LP55231 Evaluation Software Control Panel.

Set 5 mA current, 50% PWM for LEDs 1 and 2; set 3.5 mA current, 50% PWM for LED 7.

In order to activate the compensation function tag the check box next to Correction factor slider. The slope

for the temperature compensation line can be set by the slider. A simple approximation for the RGB LED

temperature compensation would be +1.3%/°C for red LED and +0.2%/°C for green and blue so that the

intensity of all the colors remain approximately the same over the temperature from 25°C to 60°C.

To observe the effect of the compensation on color, try the following: Under Temperature label, tag Start

conversion (this enables the LP55231 internal temperature sensor) and continuous measurement

(continuous temperature measurement). Enter 25°C to the External sensor box and click on WR button to

write the reading to the LP55231 memory. Now toggle between internal sensor and external sensor as

you warm up the LEDs and LP55231 with a hair dryer. When the “external sensor” is active, the

temperature information is read from register TEMPERATURE WRITE (addr. 40H). When the temperature

is 25°C all the compensation settings have no effect, so when you have the external sensor activated, you

will see the “uncompensated” situation. When you activate the internal sensor, you will see the effect of

the compensation as the ambient temperature is raised. Without compensation emitted light will be drifted

somewhat towards a more bluish white, because the red LED element of the RGB LED shows the

strongest temperature dependence.

LED Error Detection

To measure VF of an LED set PWM = 100% for the LED and set the desired LED current with the current

slider. Disable temperature compensation. On LED test portion tag Start conversion and Continuous

measurement. Click on RD button to read the test result from LP55231’s internal register. Try with

different current settings and compare the result with the value specified by the manufacturer. If there is a

short to ground in the LED circuit the result is ~0V, and if there is an open the result is ~4.5V. This feature

can also be addressed to measure the voltage on VDD, VOUT, and INT pins. Typical example usage

includes monitoring battery voltage or using INT pin as a light sensor interface (A/D converter value can

be used as a variable in program control).

Charge Pump Gain Control

Charge pump gain can be forced to 1x or 1.5x; alternatively, the user can let the LP55231 decide the best

charge pump gain based on LED forward voltage requirements by selecting AUTO mode (this is the most

useful setting in real applications). Note that outputs D7, D8, and D9 are powered directly from VDD, and

they have no effect on gain change decision-making. LP55231 charge pump has a gain change hysteresis

which prevents the mode from toggling back and forth (1x -> 1.5x -> 1x...), which would cause ripple on

VIN and LED flicker.

The hysteresis region width depends on the choice of threshold voltage. Threshold voltage is defined as

follows VTHRESHOLD = VDD - MAX(voltage on D1 to D6). If VTHRESHOLD is larger than the set value

(100 mV to 400 mV), the charge pump is in 1x mode. A good compromise solution between efficiency and

performance is 200 mV. In addition, to take the charge pump total load current into account, enable the

adaptive hysteresis.

8The LP55231 Evaluation Kit SNVU214B–April 2013–Revised December 2015

Submit Documentation Feedback

l TEXAS INSTRUMENTS

TEXT EDITOR SOURCE

CODE FILE

*.src

COMPILER

LIST FILE *.lst

HEX FILE *.hex

BINARY FILE *.bin

LP5523

EVALUATION

SOFTWARE

LP5523

REGISTERS/

SRAM

SOURCE

CODE

EXECUTABLE

HEX CODE

SERIAL BUS

www.ti.com

Timer enable activates forced mode change. In forced mode charge pump mode change from 1.5x to 1x is

attempted at the constant interval specified by the Timer control. With infinite setting the charge pump

switches gain from 1x mode to 1.5x mode only. The gain reset back to 1x is enabled under certain

conditions, for example in the power-save mode. Forced mode and threshold parameters are used to

optimize efficiency in a real design - it is desired that 1.5x gain is used only when needed.

LP55231 Programming

PROGRAMMING FLOW CHART

Programming Flow Chart shows the typical programming flow of the LP55231. The program is first typed

in with PSPad (or equivalent) text editor. Then the program is compiled into a hex and binary file. Finally

the hex file is loaded into the LP55231's memory and tested.

Programming Flow Chart

RESERVED KEYWORDS

The names of registers and instructions are assembler-reserved keywords. For the LP55231, the following

words are reserved and may not be used as statement labels:

• ra

• rb

• rc

• rd

Instructions

• ramp

• set_pwm

• wait

• mux_ld_start

• mux_ld_end

• mux_map_start

• mux_sel

• mux_clr

SNVU214B–April 2013–Revised December 2015 The LP55231 Evaluation Kit

l TEXAS INSTRUMENTS

www.ti.com

• mux_map_next

• mux_map_prev

• mux_ld_next

• mux_ld_prev

• mux_ld_addr

• mux_map_addr

• rst

• branch

• int

• end

• trigger

• jne

• jl

• jge

• je

• ld

• add

• sub

Directives

• .segment

• ds

• dw

THE STRUCTURE OF AN LP55231 PROGRAM

Example Code of LP55231 Program shows an example of an LP55231 program. When this program is

run, the program will flash a red LED once per second.

Although this program is short and simple it shows all the main parts of a typical LP55231 program.

Commenting

Commenting starts with a semicolon (;). The compiler will ignore all characters after a semicolon. If you

are using PSPad editor and have customized the editor according to the instructions on first pages of this

document, the editor recognizes comments, directives, labels, and instructions automatically and uses

different highlighter colors for different data types.

Directives

The directives are not translated directly into LP55231. Instead, directives are instructions for the

LASM.exe compiler. Directives are used to adjust the location of the engine 1, 2, and 3 programs in

memory and reserve memory resources in the LP55231 SRAM. For example .segment program1 is a

directive which tells the compiler that whatever follows is the program for the program execution engine 1.

An overview of the directives is given in the following table.

10 The LP55231 Evaluation Kit SNVU214B–April 2013–Revised December 2015

Submit Documentation Feedback

l TEXAS INSTRUMENTS .seljmznt program) lubpl mm_nlx “Um zss "alt 9,4, sec_ymm a wait 9,43 hxancn a, lump)

www.ti.com

Directive Description Example source code

.segment Adjust the location of the programs in SRAM. .segment program1

Note the leading dot .segment flashing_light

ds Define Storage; The directive reserves ds 3

memory resources in the SRAM. The ds ds 17

directive takes one parameter, which is the

number of words to reserve. The number of

bits in a word (word length) is 16. The

allocated words are initialized with zeros

dw Define constant Word. Inserts a binary word dw 0000000011111111b

to the SRAM. dw FFABh

dw 3

Labels

A label is a symbolic address. Labels are used to mark program line(s), like in branch instruction and

labeling mapping table rows. Labels must have the colon (:) suffix. In the Example Code of LP55231

Program code loop1: is a label which indicates the starting address of the loop.

Instructions

Instructions are executable statements. LASM-compiler translates text-based language source instructions

into hex- and binary-based executable codes. For example in the code presented below Example Code of

LP55231 Program,set_pwm is an instruction. Almost all the instructions take operands, which may be

constants (like FFh), or variables stored in the LP55231 registers (like ra) - ra stands for variable a

(register a), rb, for variable b, etc.

Example Code of LP55231 Program

PRODUCING AN EXECUTABLE FILE

Once the text-based source file is typed in and saved using the text editor (PSPad), the source code

window should look like the one in Example of Compiling Source Code. To call the compiler routine, select

File >> Compile. The PSPad LOG window shows the progress of compiling. If the compiler generates

error messages, LOG window is necessary for locating these errors.

A listing file, a hex file, and a binary file are produced by the LASM.exe compiler. The name of the files

are the same name that you have given to the source code file, with the *.lst, *.hex or *.bin extension.

*.hex and *.bin files contain the machine code.

SNVU214B–April 2013–Revised December 2015 The LP55231 Evaluation Kit

l TEXAS INSTRUMENTS . ‘ . . D E: Elﬁﬁeﬂs Edk iaavch WM FDLM Inn‘s HYML Settlms Mndow ﬂab _ 6‘ X H~&'Eﬂ'®¥:£“‘l§uwlﬂll swine-ad was TOEHlWMVO‘YG E I“ v . l.° . ZP . “P ‘ *9 ‘ 5.0 . 6F . ”P . .segmgnt program! Begun 01 a semene : .mx_ss1 3 5e1eces LED :(s green LED on the emu. board). EMS” loom: "Lynn rrh Eeglnnxng of a loop, see pm co full scale. 3 D LAW nan H.241 mm for 0.24 seconds. 7 ”Kl-ED W‘ "Lyn-n on). Set PM to 04» NWExEED-W want a.“ Walt for 0.24 seconds e hunch 0, luupl ,- Endless loop. . msuhpl end 7 .segllenl pzugraxnz ,- Segln of s segment mire]. 7 5e1eczs LED 7 (s red LED on me evs1. boatdh JDDpZ: let_m rrh Segmrmzny of a loop, sec Wm co full scale. mg 0.43 Walt for 0.45 seconds. "Lynn own See my co as nan u.qa , mm for 0.45 seconds branch a, wow ,- End1ess loop. | end < ‘=""> ‘ ‘ ‘ 15‘ 1/17 [m] s :2 sum Lysu Dos Cad: page‘ANSHWmdnws) Lou Searchﬁasltx‘5:amhlnFlerResu\hﬂ r1? \ ‘V/ X B LPSSZCI Lysu campue: V.D.E A; source ﬁle C:\LP55231\LASH\BL)nk LELSKI: cucpuc cede nJe c:\Lp55231\man\annk Lumbex Free memory: 5: Errors: u Prucess cumpleted, Ex): Cude

www.ti.com

Example of Compiling Source Code

LOADING A PROGRAM TO THE LP55231's SRAM

To upload code into the LP55231 SRAM start the LP55231.exe evaluation software. Select the Program

tab Master Control of the Program Tab. The Program tab is divided into two parts: the right contains the

program's source code and the compiled version of the code; the left part contains program execution

engine controls. Load the generated *.hex file into the evaluation software view: Click Open Source File

button ( Open Source File Button In Program Tab), browse the file and click Open.

Open Source File Button In Program Tab

To download the machine code into the LP55231, click on download buttonDownload Opened Source File

Into LP55231. Pressing this button sets all the engine modes to Load.

12 The LP55231 Evaluation Kit SNVU214B–April 2013–Revised December 2015

Submit Documentation Feedback

l TEXAS INSTRUMENTS

www.ti.com

Open Source File Button In Program Tab (continued)

Download Opened Source File Into LP55231

Program can be loaded also from the Code memory tab (see Code Memory Tab). In this case one must

set the operation mode to Load. In Code memory tab, one must first select the address where data is

written. Once the address is active, hexcidecimal data can be written in the Data entry field, then push the

Update button. Once all the data is updated to the wanted addresses, it can be written to the SRAM

memory by pushing the Write Page, which writes two lines in code memory table (first two lines refer to

page 0, next two lines to page 1, etc. Pages can be changed with the page selector) or by pushing Write

All, which updates the whole memory. Once the data is written to SRAM, operation mode can be set to

Run and Execution mode for example to Free Run. Note that Program Counter(s) must be set

accordingly. This is not done automatically like loading program by clicking the Download-button. Note

also that the program code does not show up in the program view (in Program tab).

RUNNING THE PROGRAM

The program is run by checking the Run from the Master control and clicking on Free run-button. This way

all the engines will start at the same time. If you have fewer than three engines in use, extra engines must

be disabled by checking off the box in each engine section. See Master Control of the Program Tab

below: this program has only two engines in use, and the engine three is checked off. If this is not done

the programs may not work correctly. Engines can also be run from individual engine control. One

convenient way of debugging the programs is by running the individual engines step by step. Individual

engine control can be managed also with multiple engines, but then they won't start at the same time.

SNVU214B–April 2013–Revised December 2015 The LP55231 Evaluation Kit

l TEXAS INSTRUMENTS ETxasInsuum n15 LP55231 valual nkl He Ojevatmn He‘p m Newer vane A Mam ngmxcmememmHm} 2?: ma 2327212 x 7 mm W W Law Me A Wmmmmmmsa nmmnnnn 0 3%‘ m mu‘xgse\3rrh,siechsLE§ arla‘gve: i Maslevcannd m7 :2, wm , 2 Wm H a an , §3333313353w 3333333 :2 am my ,wmmmm i _ w. m mun set wmﬂﬂh ,SeAWanz ﬂuuquYuN/urnsa mHm rower am We“ ﬂail; m m W331.“ Mawmmm ﬂ ”‘ WNW“ mm “W“ [6 Anm hvanch El, \amﬂ ,End‘ess \aap K m WNW“ “W“ “W“ Engme‘ Engme 2 Engme 3 EB EUEIEI end an nacuwwm nnnnnnnn r D‘same F Dwsah‘e r Dwsah‘e 0 U7->SDEI7 mum ,Se‘eclsLEDHavedl W mcumm nmmnnnn ; R g R g R m an ‘aapZ sawmw ,Begmmngalabap, W uscuwwm nmmnnnn ; H33 ; H33 ; H33 [a mm mm ,wmmmasmm m uncuquL nmmnnnn m mun seprmﬂﬂh ,SeAWanz m muwm “mam .,. .9 .,. .3, a. .3. m 7Enn mum ,Waulmﬂéﬁsecands m mm Kidd Kidd Wadi u: m WWWWNW m umwm WWW ngvamcaumev‘ ngvamcaumevZ ngvamcaumevS to cum end ﬂm PVIIM nmmnnnn Du j [In j [In j E 3333 LDZPWM WWW“ an w an w an M m m. m mm nmmnnnn i n Dunn W mm mm Stauaddvzxﬂ Stauaddmsxz Stauaddmxxﬂ m WM 37m j 37m j {F j 3 3333 W WWM “WWW“ RD WR RD WR RD WR w nunn mu mum nmmnnnn ‘5 mm W WW WWW VauameA VauameA VauameA ‘5 mm m m PVIIM man man an an an ‘7 mm m mommy mmuu m man i RD RD RD ‘9 mm m4 mcuwwzw mmuu VEV‘Eh‘eDlv/Wl Vanah‘eD ‘A EIEIEIEI TH WWW mm {in j mama: m Dunn m mmm mmuu LEDmappmg 9 ‘EWUHU ZDH uxcuwwzw mmuu 1' scan Read ; 3333 7:3: :;:;;::; ® 22 w; was «3 5 m v nnH \mmzwmm ‘nnnnnnnn u my «mm 3 «my, 3 {mam 3 amp, 3 “rem", “my, 3 .2 3 m WR‘ usa OK oazmzn

www.ti.com

Master Control of the Program Tab

14 The LP55231 Evaluation Kit SNVU214B–April 2013–Revised December 2015

Submit Documentation Feedback

l TEXAS INSTRUMENTS

www.ti.com

Master Control of the Program Tab (continued)

There are four modes for operating the programs described below (see Master Control of the Program

Tab). Operation mode is selected by clicking the desired check box.

Operation modes:

•Disable — Engine operation is disabled, and they cannot be run.

•Load — In this mode writing to program memory is allowed. All the three engines are on hold while

one or more engines are in load program mode. PWM values are also frozen. Program execution

continues when all the engines are out of load program mode. Load program mode resets the program

counter of the respective engine. Load program mode can be entered from the Disable mode only.

Entering load program mode from the run program mode is not allowed. Note that load mode does not

automatically load the program opened with Open Source File button (see Open Source File Button In

Program Tab). When using this operation mode, one must write the program through the Code

memory tab .

•Run — This mode executes the instructions stored in the program memory. Execution register

(ENG1_EXEC etc.) bits define how the program is executed (hold, step, free run, or execute once).

Program start address can be programmed to Program Counter (PC) register. The PC is reset to zero

when the PC’s upper limit value is reached.

•Halt — In this mode instruction execution aborts immediately, and engine operation halts. Execution

can be continued if operation mode is set to Run again.

The following four execution modes exist. An execution mode is selected with one of the four push

buttons. Functions of the buttons from left to right are:

Executions modes:

•Stop — Engine execution is stopped. The current instruction is executed and then execution stopped.

•Step — Execute the instruction at the location pointed by the PC, increment the PC by one and then

reset ENG1_EXEC bits to 00 (enter Stop-mode).

•Execute Command — Execute the instruction pointed by the current PC value and reset

ENG1_EXEC to 00 (i.e. enter Stop-mode). The difference between Step and Execute Command is that

Execute Command does not increment the PC.

•Free Run — Start program execution from the instruction pointed by the PC.

SNVU214B–April 2013–Revised December 2015 The LP55231 Evaluation Kit

l TEXAS INSTRUMENTS ETxasInsuum n15 LP55231 valual nkl He Ojevatmn He‘p m Newer vane A Manua“ngvm caaememawmw} nnH mannmn x mm mmzmm nmnmm Manage ngpage Adm: We PM W RAnuMErmcMsa nmmnnnn 9 g m RAnuMErmcLsa nmmnnnn Reads“ We“ U“ “m“ 5 4 NH uuWuYuN/urrmsa nmmnnm LN ”WWW/”VHS“ mm“ [In/n8 ‘m/EIS ‘EIZ/EIA ‘EIS/EIB ‘m/n: ‘EIE/EID ‘EIS/EIE ‘m/DF ‘ m mcuquL nmmnnnn W muwm WWW nu suns ouFF 55m: ouuu 55m: Aum Euuu Sum an mcuquL nmnnnnn mg mp; 7Enn mun 7Enn Aﬂm man man mm L“ ”WNW“ “WW“ m man man man man man man man man DAM uscuquL nmmnnnn m mmwm WWW m man man man man man man man man ﬁmmmm nmmnnnn 2n man man man man man man man man LDHDHWWL “WWW“ 28 man man man man man man man mm m uvcuquL nmmnnnn M mm mm 3n man man man man man man man mm W mm nmmnnnn 38 man man man man man man man mm ‘8“ WW “WWW w man man man man man man man mm m WWM nmmnnnn W mm mm m man man man man man man man mm W mm nmmnnnn 5n gunnn man man man man man man man WWW/M “WWW 58 gunnn man man man man man man um um mm nmmnnnn w mm nmmnnnn m momma mmuu m momma mmuu m momma mmuu 2w momma mmuu 2AM momma mmuu m momma mmuu m momma mmuu m DVEURRENY mmuu m ms: mmmm m mm»: nmmnnnn m mm»: nmmnnnn 3w mama»: nmmnnnn 3AM SYAYUSNNYERRUPY manmnn v nnH \mmmwmm ‘nnnnnnnn u my «mm u «my, u {mam u amp, m “rem", “my, u .2 \ m WR‘ USBOK oazmzn

www.ti.com

Code Memory Tab

DEBUGGING CONSIDERATIONS

There are a few ways to see how the compiler translates the instructions to machine code. Listing file

(*.lst) may be used for locating assembling errors. The listing file contains the source code along with the

compiled machine code. The files can be examined in any text editor. This is helpful for debugging and

seeing how source code is translated into machine code. Listing File of the Example Program First shows

an example of listing file. The first column is the row number, second column indicates the SRAM memory

address, third shows the machine code data, and fourth column includes the source code. Note that the

.segment directives show the start address of the program; i.e., where to the Program Counters should

point.

From the produced two hex-files user can see the pure machine code represented in hexadecimal in two

different ways. In *.he2 —file representation of data is 0xYY (YY being the changing data information). In

*.hex file the data is represented YY, where YY is the changing data information. In *.he2 file the 8–bit

long data elements are separated with comma whereas in *.hex file they are separated with tab. In both

files data is represented like in Code memory tab memory table. First two columns correspond to first

column in Code memory tab memory table, third and fourth columns correspond to second column etc.

For example if the user would have mux_inc instruction (9D80), in he2 it would be 0x9D, 0x80 and in hex

file it would be 9D [tab] 80. In hex-file the start addresses of the programs are at the bottom, whereas in

*.he2 file they are on the first row engine 1 start address being first, engine 2 second, and engine 3 start

address third. Also in the bin-file user can see the pure machine code represented in binary. First three

rows represent the start addresses of the programs. After the start addresses the program code follows.

16 The LP55231 Evaluation Kit SNVU214B–April 2013–Revised December 2015

Submit Documentation Feedback

l TEXAS INSTRUMENTS

www.ti.com

Programs can be debugged in the evaluation software Program tab by running the program in steps using

Step or Execute command execution modes. Also one way to see what is written to the LP55231 is to

look at the evaluation program History tab History Tab.

SNVU214B–April 2013–Revised December 2015 The LP55231 Evaluation Kit

l TEXAS INSTRUMENTS :0. Fame! law 5210 1 1 00 .segmenc prugraml , Ee§in BF 3 se menc 2 00 9003 m0x15e1 3 . se eccs LED 3 a green LED an the em. buard). 3 01 40:: 11:00 . segpw rm , Eeginm'ng uf a 10013, sec WM (1: m1 5(312. 4 02 5:00 wan: 0.24 ; wan Fur 0.24 Secnnds. s 03 4000 segpw 00h , sec WM (1: 0% a 04 5:00 wait 0.24 ; wait Fur 0.24 Secnnds 7 05 A001 branch 0. 10001 ; enmess 1000. s 06 c000 and 9 07 .Segment prugramz ﬁe§1n Bf a Segment 10 07 9007 m0x15e1 7 se eccs LED 7 (a red LED an the em. buard). 11 0s 40:: 1000 se ,pw rm , Eeginm'ng uf a 10013, sec WM (1: m1 5(312. 12 09 7:00 wan: 0.4a ; wan Fur 0.4a Secnnds. 13 0A 4000 segpw 00h , sec WM (1: 0% 14 05 7:00 wait 0.4a . wait Fur 0.4a Secnnds 15 0c A001 branch 0. 10002 , enmess 1000. 16 0o c000 and 17 Segments prngraml 00 prngramz = 07 Free memury 52 Errur . 0 :1. gm... Lav we... : mew?” Emmy Hwy 11...... x mmvem 1w .0. a... Wv1e1251121n1 m . mmmawnrrmgn 1... 0001 WWW?! 111 15 me 12:11:] 4; mun/WNW? 13. 11111111 Wyn-11:11115n m man .0. 1mm Mmzcuzl 51 m man .0. mm 141. mm 52 m 00mm 0000 mm M" ”5‘“! 53 m. 0:011 in 121 mm mm mm m. 1221221 55 as man .0. 1mm me mm as m man .0. 1mm Mle1zc112157 m mmkm 1mm Wm M" ”5‘“! 55 m. 0:011 55 m man .0. mm m. 12:1121 54 m man .0. mm m. mm as m "w 11...... Mle1zc11215: tn 5) m w F; i m w m z m An 01 :0 MN 11...... Mmltuusu rm wunzcmlsz an “mm“ MMZEHZISI U7 0...... Mmzmmsn w 0...... Mkeutmm er WW Mmmms} 7e 0...... wuzcuzlsi m 01.001215. «1 0...... Mmzmmss m 0...... m.0:1m.. 7e 10101111 wunzcmm m WW 01.122021“ 4.: Mmzmmss m ‘“‘“““ Mkeutmlm in mm. m.0:1m.a m 10101111 wuazcuzls: m mm wuz1251321sn 1111 mm Mmzmmsi m M 0:01.; m mm. wunzcmm 01 10101111 01.122021“ m 111011001 Mle1zc112151 m 0...... Mkeutmliz cu Mmltmlsl m mama wuaztuzlm m 0...... wuz125112155 m m. 1amn£79mm£tmm1 mama 1 11 .17.. .11....” 11 .11....“ 1 0......” 0mm 11 . e111 3......“ 11 .1 1 .1. 1 W1 1 1155 (x 032mm

www.ti.com

Listing File of the Example Program First

History Tab

Instruction Set Details

This section provides the syntax with detailed examples for all the LP55231 instructions supported by the

LASM assembler.

18 The LP55231 Evaluation Kit SNVU214B–April 2013–Revised December 2015

Submit Documentation Feedback

l TEXAS INSTRUMENTS

www.ti.com

LED DRIVER INSTRUCTIONS

INSTRUCTION SYNTAX FUNCTION EXAMPLE 16-BIT ASSEMBLED ASSEMBLED

BIT SEQUENCE CODE HEX

ramp time, PWM Output PWM with ramp 0.6, 255 0000 1010 1111 1111 0A FF

increasing / decreasing

Time is a positive constant ;Ramp up to full scale over

duty cycle.

(0.000484*PWM to 0.6s

0.484*PWM);

PWM is a positive or negative ramp 1.2,-255 0001 0101 1111 1111 15 FF

constant (-255 to 255).

Note: time is rounded by ;Ramp down to zero over 1.2s

assembler if needed.

ramp var1, prescale, var2 Output PWM with ld ra, 31 1000 0100 0000 0001 84 01

increasing / decreasing

Var1 is a variable (ra, rb, rc, ld rb, 255

duty cycle.

rd);

Prescale is a boolean constant ramp ra, pre=0,+rb

(pre=0 or pre=1);

Var2 is a variable (ra, rb, rc, ;Ramp up to full scale over

rd). 3.9s

ld ra, 1 1000 0100 0001 0001 84 11

ld rb, 255

ramp ra, pre=0,-rb

;Ramp down to zero over

0.12s

set_pwm PWM Generate a continuous set_pwm 128 0100 0000 1000 0000 4080

PWM output.

PWM is a constant (0-255 or 0 ;Set PWM Duty-Cycle to 50%

- FFh).

set_pwm var1 Generate a continuous ld rc, 128 1000 0100 0110 0010 8462

PWM output.

Var1 is a variable (ra, rb, rc, set_pwm rc

rd).

;Set PWM Duty-Cycle to 50%

wait time Pause for some time. wait 0.25 0110 0000 0000 0000 6000

Time is a positive constant ( 0 ;Wait 0.25 seconds

to 0.484).

Note: time is rounded by

assembler if needed.

LED MAPPING INSTRUCTIONS

INSTRUCTION SYNTAX FUNCTION EXAMPLE 16-BIT ASSEMBLED ASSEMBLED

BIT SEQUENCE CODE HEX

mux_ld_start address Defines the start mux_ld_start row1 1001 1110 0000 0000 9E00

address of the

Address is a label which ; The first row can be found at Assumed that row1

mapping data table.

specifies where to find the first the address marked with row1 points to addr 00h.

row.

mux_map_start address Defines the start mux_map_start row1 1001 1100 0000 0000 9C00

address of the

Address is a label which ; The first row can be found at Assumed that row1

mapping data table

specifies where to find the first the address marked with row1 points to addr 00h.

and sets the row

row. active.

mux_ld_end address Defines the end mux_ld_end row9 1001 1100 1000 1000 9C88

address of the

Address is a label which ; The last row can be found at Assumed that row9

mapping data table.

specifies where to find the last the address marked with row9 points to addr 08h.

row.

mux_sel output Connects one and only mux_sel 1 1001 1101 0000 0001 9D01

one LED output to an

Output is a constant (0 to 9 or ; D1 output will be connected

engine.

16). to the engine.

SNVU214B–April 2013–Revised December 2015 The LP55231 Evaluation Kit

Submit Documentation Feedback

l TEXAS INSTRUMENTS

www.ti.com

mux_clr Clears engine-to-driver mux_clr 1001 1101 0000 0000 9D00

mapping.

mux_map_next Sets the next row mux_map_next 1001 1101 1000 0000 9D80

active in the mapping

table.

mux_map_prev Sets the previous row mux_map_prev 1001 1101 1100 0000 9DC0

active in the mapping

table.

mux_ld_next The index pointer will mux_ld_next 1001 1101 1000 0000 9D81

be set to point to the

next row in the

mapping table.

mux_ld_prev The index pointer will mux_ld_prev 1001 1101 1100 0000 9DC1

be set to point to the

previous row in the

mapping table.

mux_ld_addr address Sets the index pointer mux_ld_addr row2 1001 1111 0000 0001 9F01

to point the mapping

Address is a label which ; The index pointer will be set Assumed that row2

table row defined by

specifies the row to which the to point to the row labelled with points to addr 01h.

address.

pointer is to be moved. row2.

mux_map_addr address Sets the index pointer mux_map_addr row2 1001 1111 1000 0001 9F81

to point the mapping

Address is a label which ; The index pointer will be set Assumed that row2

table row defined by

specifies the row of the table to point to the row labelled with points to addr 01h.

address and sets the

that will be set active. row2 and the row will be set

row active. active.

BRANCH INSTRUCTIONS

INSTRUCTION SYNTAX FUNCTION EXAMPLE 16-BIT ASSEMBLED ASSEMBLED

BIT SEQUENCE CODE HEX

rst Resets program rst 0000 0000 0000 0000 0000

counter and start the

program again.

branch loopcount, address Repeat a section of branch 20, loop1 1010 1010 0000 0000 AA00

code.

Loop count is a constant (0 to ; define loop for 20 times Assumed that loop1

63); points to addr 00h.

Address is a label which

specifies the offset.

branch var1, address Repeat a section of ld ra, 20 1000 0110 0000 0000 8600

code.

Var1 is a variable (ra, rb, rc, branch ra, loop1 Assumed that loop1

rd); points to addr 00h.

Address is a label which ; define loop for 20 times

specifies the offset.

int Causes an interrupt. int 1100 0100 0000 0000 C400

end interrupt, reset End program end i 1101 0000 0000 0000 D000

execution.

Interrupt (i) is an optional flag. ; End program execution and

Reset (r) is an optional flag. send an interrupt.

trigger w{source1|source2...} Wait a trigger. trigger w{1} 1110 0000 1000 0000 E080

Source is the source of the ;Wait a

trigger (1, 2, 3, e).

trigger from the engine 1.

trigger s{target1|target2...} Send a trigger. trigger s{1} 1110 0000 0000 0010 E002

Target is the target of the ;Send a

trigger (1, 2, 3, e).

trigger to the engine 1.

20 The LP55231 Evaluation Kit SNVU214B–April 2013–Revised December 2015

Submit Documentation Feedback

l TEXAS INSTRUMENTS

www.ti.com

jne var1, var2, address Jump if not equal. jne ra, rb, flash 1000 1000 0010 0001 8821

Var1 is a variable (ra, rb, rc, ;Jump to flash if A != B. Assumed that offset =

rd); 2.

Var2 is a variable (ra, rb, rc,

rd);

Address is a label which

specifies the offset.

jl var1, var2, address Jump if less. jl ra, rb, flash 1000 1010 0001 0001 8A11

Var1 is a variable (ra, rb, rc, ;Jump to flash if A < B. Assumed that offset =

rd); 1

Var2 is a variable (ra, rb, rc,

rd);

Address is a label which

specifies the offset.

jge var1, var2, address Jump if greater or jge ra, rb, flash 1000 1100 0001 0001 8C11

equal.

Var1 is a variable (ra, rb, rc, ;Jump to flash if A >= B. Assumed that offset =

rd); 1.

Var2 is a variable (ra, rb, rc,

rd);

Address is a label which

specifies the offset.

je var1, var2, address Jump if equal. je ra, rb, flash 1000 1110 0001 0001 8E11

Var1 is a variable (ra, rb, rc, ;Jump to flash if A = B. Assumed that offset =

rd); 1.

Var2 is a variable (ra, rb, rc,

rd);

Address is a label which

specifies the offset.

DATA TRANSFER AND ARITHMETIC INSTRUCTIONS

INSTRUCTION SYNTAX FUNCTION EXAMPLE 16-BIT ASSEMBLED ASSEMBLED

BIT SEQUENCE CODE HEX

ld var, value Assigns a value to a ld ra, 10 1001 0000 0000 1010 900A

variable.

Var is a variable (ra, rb, rc); ;Variable A = 10.

Value is a constant (0 to 255

or 0 to FFh).

add var, value Add the 8-bit value to add ra, 30 1001 0001 0001 1110 911E

the variable value.

Var is a variable (ra, rb, rc); ;A = A + 30.

Value is a constant (0 to 255

or 0 to FFh).

add var1, var2, var3 Add the value of var3 add ra, rc, rd 1001 0011 0000 1010 930B

to the value of var2

Var1 is a variable (ra, rb, rc); ;A = C + D.

and store the result in

Var2 is a variable (ra, rb, rc, var1.

rd);

Var3 is a variable (ra, rb, rc,

rd);

sub var, value Subtract the 8-bit value sub ra, 30 1001 0010 0001 1110 921E

from the variable

Var is a variable (ra, rb, rc); ;A = A - 30.

value.

Value is a constant (0 to 255

or 0 to FFh).

SNVU214B–April 2013–Revised December 2015 The LP55231 Evaluation Kit

Submit Documentation Feedback

l TEXAS INSTRUMENTS

www.ti.com

sub var1, var2, var3 Subtract the value of sub ra, rc, rd 1001 0011 0001 1011 931B

var3 from the value of

Var1 is a variable (ra, rb, rc); ;A = C - D

var2 and store the

Var2 is a variable (ra, rb, rc, result in var1.

rd);

Var3 is a variable (ra, rb, rc,

rd);

22 The LP55231 Evaluation Kit SNVU214B–April 2013–Revised December 2015

Submit Documentation Feedback

l TEXAS INSTRUMENTS

www.ti.com

Programming Examples

This section gives practical programming examples. A series of programs introduce the main features of

the LP55231 chip, and the example programs are easy to tailor to the specific needs of end application.

EXAMPLE 1: CONTROLLING MULTIPLE LEDS WITH ONE ENGINE

The example below is basically the program shown in the Example Code of LP55231 Program before

(simple LP55231 program), but here the mapping table is used to establish engine1-to-LEDs connection.

In the mapping table '0' means that the LED isn't connected to the engine; '1' means that the LED is

connected to the engine. In the example program below bits 6 to 8 are set to ‘1’ so that outputs 7, 8, and 9

are mapped to the engine 1.

LED Mapping Chart

Bit 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0

Output GPO N/A N/A N/A N/A N/A N/A D9 D8 D7 D6 D5 D4 D3 D2 D1

mapping_table: dw 0000000111000000b ;Red LEDs on the evaluation board.

;'1' = LED is mapped; '0'= LED isn't mapped.

.segment program1 ;Begin of a segment.

mux_map_start mapping_table ;Mapping table start address in the memory.

;The first row of the table will be activated

loop1: set_pwm FFh ;Beginning of a loop, set PWM to full scale.

wait 0.48 ;Wait for 0.48 seconds.

set_pwm 00h ;Set PWM to 0%.

wait 0.48 ;Wait for 0.48 seconds.

branch 0,loop1 ;Endless loop.

EXAMPLE 2: FADE-IN/FADEOUT EFFECTS AND CHANGING MAPPING OF LEDS

In this example ramp instruction is used to produce fade-in/fade-out effects. Note: The use of a logarithmic

PWM profile with ramp instruction ensures the light and color changes appear smooth to the human eye.

The same effect is repeated for all the LEDs by changing the engine1-to-LED mapping. After that, the

intensity of the LEDs is increased gradually, and finally all the LEDs are set OFF.

row1: dw 0000000000000001b ;Map green LED = D1 on the eval. board.

dw 0000000000000010b ;Map blue LED = D2 on the eval. board.

dw 0000000001000000b ;Map red LED = D7 on the eval. board.

dw 0000000000000100b ;Map green LED = D3 on the eval. board.

dw 0000000000001000b ;Map blue LED = D4 on the eval. board.

dw 0000000010000000b ;Map red LED = D8 on the eval. board.

dw 0000000000010000b ;Map green LED = D5 on the eval. board.

dw 0000000000100000b ;Map blue LED = D6 on the eval. board.

row9: dw 0000000100000000b ;Map red LED = D9 on the eval. board.

row10: dw 0000000111111111b ;Map all LEDs on the eval. board.

.segment program1 ;Program for engine 1.

mux_map_start row1 ;Map the first LED.

mux_ld_end row9 ;End address of the mapping data table.

loop1: ramp 1.0, 255 ;Increase PWM 0->100% in 1 second.

ramp 1.5, -255 ;Decrease PWM 100->0% in 1.5 seconds.

wait 0.4; ;Wait for 0.4 seconds.

mux_map_next ;Set the next row active in the mapping table.

branch 8,loop1 ;Loop 8 times

SNVU214B–April 2013–Revised December 2015 The LP55231 Evaluation Kit

Submit Documentation Feedback

l TEXAS INSTRUMENTS

www.ti.com

loop2: ramp 0.5, 128 ;Increase PWM by 128 steps in 0.5 second.

mux_map_next ;Set the next row active in the mapping table.

;Note roll over of the mapping.

branch 17, loop2 ;Loop 17 times.

mux_map_addr row10 ;Set row10 active (all LEDs mapped).

set_pwm 0; ;Set all the LEDs OFF.

rst ;Reset program counter and start the program again.

.segment program2

;Program for engine 2 (empty).

rst

.segment program3

;Program for engine 3(empty).

rst

EXAMPLE 3: USING MORE THAN ONE ENGINE AND NESTED LOOPS (LOOP INSIDE A LOOP)

This program below shows how to use all the three engines simultaneously. The engines are used to

create a police beacon-type light effect. Hint: To see the effect of separate engines, start/stop engines

separately using Engine 1, Engine 2 and Engine 3 controls instead of the Master control.

blue1: dw 0000000000000010b ;Map blue LED on D2.

blue2: dw 0000000000100000b ;Map blue LED on D6.

blue3: dw 0000000000001000b ;Map blue LED on D4.

red_led: dw 0000000010000000b ;Map red LED on D8.

.segment program1 ;Program for blue LEDs on D2 and D6.

mux_map_start blue1 ;Mapping table start address.

mux_ld_end blue2 ;Mapping table end address.

loop2:

loop1: set_pwm 255

wait 0.1

set_pwm 0

wait 0.05

branch 1, loop1

wait 0.2

mux_map_next

branch 3, loop2 ;Note nested loop (loop1 is within loop2).

loop4:

loop3: set_pwm 255

wait 0.05

set_pwm 0

wait 0.05

branch 5, loop3

mux_map_next

branch 3, loop4

rst

.segment program2 ;Program for red LED on D8.

mux_map_addr red_led ;Red LED mapping.

wait 0.45

ramp 0.5, 255 ;PWM 0%->100% in 0.5 second.

ramp 1, -255 ;PWM 100%->0% in 1 second.

24 The LP55231 Evaluation Kit SNVU214B–April 2013–Revised December 2015

Submit Documentation Feedback

l TEXAS INSTRUMENTS

www.ti.com

rst

.segment program3 ;Program for blue LED on D4.

mux_map_start blue3 ;Mapping table start address.

set_pwm 255

wait 0.05

set_pwm 0

wait 0.2

set_pwm 255

wait 0.05

set_pwm 0

wait 0.45

rst

EXAMPLE 4: TRIGGERS AND INTERRUPT

This program shows how to use triggers and the interrupt. Engine 1 sends a trigger to Engine 2 when it

has set a LED to 100% PWM – Engine 2 fades the LED out to 0% PWM. Engine 1 sends an interrupt

when it has finished loop1 and waits trigger from Engine 2 AND an external trigger. Pushing the button on

the evaluation board causes an external trigger and the sequence starts over. Use RD button on the

Status/Interrupt section (see Figure 5) to clear the interrupt.

row1: dw 0000000000000001b ;Map green LED = D1 on the eval. board.

dw 0000000000000010b ;Map blue LED = D2 on the eval. board.

dw 0000000001000000b ;Map red LED = D7 on the eval. board.

dw 0000000000000100b ;Map green LED = D3 on the eval. board.

dw 0000000000001000b ;Map blue LED = D4 on the eval. board.

dw 0000000010000000b ;Map red LED = D8 on the eval. board.

dw 0000000000010000b ;Map green LED = D5 on the eval. board.

dw 0000000000100000b ;Map blue LED = D6 on the eval. board.

row9: dw 0000000100000000b ;Map red LED = D9 on the eval. board.

.segment program1 ;Program for engine 1.

mux_map_start row1 ;Map the first LED.

mux_ld_end row9 ;End address of the mapping data table.

loop1: ramp 1.0, 255 ;Increase PWM 0->100% in 1 second.

trigger s{2} ;Send trigger to engine2

mux_map_next ;Set the next row active in the mapping table.

branch 8,loop1 ;Loop 8 times.

int ;Send an interrupt.

trigger w{2|e} ;Wait trigger from engine 2 and external trigger.

rst ;Reset program counter and start the program again.

.segment program2 ;Program for engine 2.

mux_map_start row1 ;Map the first LED.

mux_ld_end row9 ;End address of the mapping data table.

loop2: trigger w{1} ;Wait for trigger from engine1.

ramp 1.0,-255 ;Decrease PWM 100->0% in 1 second.

mux_map_next ;Set the next row active in the mapping table.

branch 8,loop2 ;Loop 8 times.

trigger s{1} ;Send trigger to engine1.

rst

.segment program3

SNVU214B–April 2013–Revised December 2015 The LP55231 Evaluation Kit

Submit Documentation Feedback

l TEXAS INSTRUMENTS

www.ti.com

;Program for engine 3(empty).

rst

26 The LP55231 Evaluation Kit SNVU214B–April 2013–Revised December 2015

Submit Documentation Feedback

I TEXAS INSTRUMENTS é ‘ﬁ’ ’1 33???? H “is gags %, mmm 2 E 236; ‘ 0—‘

www.ti.com

Schematics, Layout and Bill of Materials

Schematic of the Evaluation Board Application Side

Schematic of the Evaluation Board USB Side

SNVU214B–April 2013–Revised December 2015 The LP55231 Evaluation Kit

l TEXAS INSTRUMENTS

www.ti.com

Bill of Materials

Designator Qty. Part Number Description Value Footprint

U6 1 LP55231SQ Lighting management unit 24-Pin WQFN

U3 1 FT232RL USB to UART 28-SSOP

U2 1 MSP430F1612IPM Micro controller 64-LQFP

U1 1 LP2985AIM5-3.3 LDO regulator 0603L

U5 1 BH1600FVC-TR Light Sensor

D1, D2, D3 3 ASMT-YTC2-0AA02 RGB LED 6-PLCC

D14 2 HSMS-A100-J00J1 Red LED 2-PLLC

D4, D5, D6, D7,

D8, D9, D10, D11,

D12 9 CLM3C-WKW-CWBYA453 White LED 2-PLCC

C1, C2, C3 3 LMK212B7475KG-T Ceramic capacitor 4.7 µF, 10V 0805

C5 1 C0603C103J5RACTU Ceramic capacitor 10 nF, 50V 0603

C6, C9, C10, C11,

C12 5 C0603C104K8RACTU Ceramic capacitor 0.1 µF, 10V 0603

C7 1 C2012Y5V1A106Z Ceramic capacitor 10 µF, 10V 0805

C15, C14 2 LMK105BJ105KV-F Ceramic capacitor 1 µF, 10V 0402

C16, C17 2 JMK105BJ474KV-F Ceramic capacitor 0.47 µF, 6.3V 0402

C23 1 C0603C105Z8VACTU Ceramic capacitor 1 µF, 10V 0603

C24 1 C0603C475K8PACTU Ceramic capacitor 4.7 µF, 10V 0603

R1, R4, R5 3 ERJ-3GEYJ104V Resistor 100k 0603

R2, R8, R13 3 ERJ-3GEYJ103V Resistor 10k 0603

R3 1 RC0603JR-074K7L Resistor 4.7k 0603

R9 1 ERJ-3GEYJ562V Resistor 5.6k 0603

R10 1 ERJ-3GEYJ183V Resistor 18k 0603

R12 1 ERJ-3GEYJ101V Resistor 100 0603

R14 2 ERJ-3GEYJ331V Resistor 330 0603

R6, R7 2 ERJ-3GEYJ152V Resistor 1.5k 0603

L1 1 MMZ2012S400A Ferrite 0805

28 The LP55231 Evaluation Kit SNVU214B–April 2013–Revised December 2015

Submit Documentation Feedback

l TEXAS INSTRUMENTS

www.ti.com

Revision History

Changes from A Revision (November 2014) to B Revision ........................................................................................... Page

• Changed "(LED1 = D4, LED2 = D5, LED7 = D6)" to "(LED1 = D4, LED2 = D5, LED3 = D6)" ................................. 5

• Changed "(LED3 = D7, LED2 = D8, LED8 = D9)" to "(LED4 = D7, LED5 = D8, LED6 = D9)" ................................. 5

• Changed "(LED5 = D10, LED6 = D1, LED9 = D12)" to "(LED7 = D10, LED8 = D11, LED9 = D12)".......................... 5

NOTE: Page numbers for previous revisions may differ from page numbers in the current version.

SNVU214B–April 2013–Revised December 2015 Revision History

STANDARD TERMS AND CONDITIONS FOR EVALUATION MODULES

1. Delivery: TI delivers TI evaluation boards, kits, or modules, including any accompanying demonstration software, components, or

documentation (collectively, an “EVM” or “EVMs”) to the User (“User”) in accordance with the terms and conditions set forth herein.

Acceptance of the EVM is expressly subject to the following terms and conditions.

1.1 EVMs are intended solely for product or software developers for use in a research and development setting to facilitate feasibility

evaluation, experimentation, or scientific analysis of TI semiconductors products. EVMs have no direct function and are not

finished products. EVMs shall not be directly or indirectly assembled as a part or subassembly in any finished product. For

clarification, any software or software tools provided with the EVM (“Software”) shall not be subject to the terms and conditions

set forth herein but rather shall be subject to the applicable terms and conditions that accompany such Software

1.2 EVMs are not intended for consumer or household use. EVMs may not be sold, sublicensed, leased, rented, loaned, assigned,

or otherwise distributed for commercial purposes by Users, in whole or in part, or used in any finished product or production

system.

2Limited Warranty and Related Remedies/Disclaimers:

2.1 These terms and conditions do not apply to Software. The warranty, if any, for Software is covered in the applicable Software

License Agreement.

2.2 TI warrants that the TI EVM will conform to TI's published specifications for ninety (90) days after the date TI delivers such EVM

to User. Notwithstanding the foregoing, TI shall not be liable for any defects that are caused by neglect, misuse or mistreatment

by an entity other than TI, including improper installation or testing, or for any EVMs that have been altered or modified in any

way by an entity other than TI. Moreover, TI shall not be liable for any defects that result from User's design, specifications or

instructions for such EVMs. Testing and other quality control techniques are used to the extent TI deems necessary or as

mandated by government requirements. TI does not test all parameters of each EVM.

2.3 If any EVM fails to conform to the warranty set forth above, TI's sole liability shall be at its option to repair or replace such EVM,

or credit User's account for such EVM. TI's liability under this warranty shall be limited to EVMs that are returned during the

warranty period to the address designated by TI and that are determined by TI not to conform to such warranty. If TI elects to

repair or replace such EVM, TI shall have a reasonable time to repair such EVM or provide replacements. Repaired EVMs shall

be warranted for the remainder of the original warranty period. Replaced EVMs shall be warranted for a new full ninety (90) day

warranty period.

3Regulatory Notices:

3.1 United States

3.1.1 Notice applicable to EVMs not FCC-Approved:

This kit is designed to allow product developers to evaluate electronic components, circuitry, or software associated with the kit

to determine whether to incorporate such items in a finished product and software developers to write software applications for

use with the end product. This kit is not a finished product and when assembled may not be resold or otherwise marketed unless

all required FCC equipment authorizations are first obtained. Operation is subject to the condition that this product not cause

harmful interference to licensed radio stations and that this product accept harmful interference. Unless the assembled kit is

designed to operate under part 15, part 18 or part 95 of this chapter, the operator of the kit must operate under the authority of

an FCC license holder or must secure an experimental authorization under part 5 of this chapter.

3.1.2 For EVMs annotated as FCC – FEDERAL COMMUNICATIONS COMMISSION Part 15 Compliant:

CAUTION

This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not

cause harmful interference, and (2) this device must accept any interference received, including interference that may cause

undesired operation.

Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to

operate the equipment.

FCC Interference Statement for Class A EVM devices

NOTE: This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to part 15 of

the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is

operated in a commercial environment. This equipment generates, uses, and can radiate radio frequency energy and, if not

installed and used in accordance with the instruction manual, may cause harmful interference to radio communications.

Operation of this equipment in a residential area is likely to cause harmful interference in which case the user will be required to

correct the interference at his own expense.

SPACER

FCC Interference Statement for Class B EVM devices

NOTE: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of

the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential

installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance

with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference

will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which

can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more

of the following measures:

•Reorient or relocate the receiving antenna.

•Increase the separation between the equipment and receiver.

•Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.

•Consult the dealer or an experienced radio/TV technician for help.

3.2 Canada

3.2.1 For EVMs issued with an Industry Canada Certificate of Conformance to RSS-210

Concerning EVMs Including Radio Transmitters:

This device complies with Industry Canada license-exempt RSS standard(s). Operation is subject to the following two conditions:

(1) this device may not cause interference, and (2) this device must accept any interference, including interference that may

cause undesired operation of the device.

Concernant les EVMs avec appareils radio:

Le présent appareil est conforme aux CNR d'Industrie Canada applicables aux appareils radio exempts de licence. L'exploitation

est autorisée aux deux conditions suivantes: (1) l'appareil ne doit pas produire de brouillage, et (2) l'utilisateur de l'appareil doit

accepter tout brouillage radioélectrique subi, même si le brouillage est susceptible d'en compromettre le fonctionnement.

Concerning EVMs Including Detachable Antennas:

Under Industry Canada regulations, this radio transmitter may only operate using an antenna of a type and maximum (or lesser)

gain approved for the transmitter by Industry Canada. To reduce potential radio interference to other users, the antenna type

and its gain should be so chosen that the equivalent isotropically radiated power (e.i.r.p.) is not more than that necessary for

successful communication. This radio transmitter has been approved by Industry Canada to operate with the antenna types

listed in the user guide with the maximum permissible gain and required antenna impedance for each antenna type indicated.

Antenna types not included in this list, having a gain greater than the maximum gain indicated for that type, are strictly prohibited

for use with this device.

Concernant les EVMs avec antennes détachables

Conformément à la réglementation d'Industrie Canada, le présent émetteur radio peut fonctionner avec une antenne d'un type et

d'un gain maximal (ou inférieur) approuvé pour l'émetteur par Industrie Canada. Dans le but de réduire les risques de brouillage

radioélectrique à l'intention des autres utilisateurs, il faut choisir le type d'antenne et son gain de sorte que la puissance isotrope

rayonnée équivalente (p.i.r.e.) ne dépasse pas l'intensité nécessaire à l'établissement d'une communication satisfaisante. Le

présent émetteur radio a été approuvé par Industrie Canada pour fonctionner avec les types d'antenne énumérés dans le

manuel d’usage et ayant un gain admissible maximal et l'impédance requise pour chaque type d'antenne. Les types d'antenne

non inclus dans cette liste, ou dont le gain est supérieur au gain maximal indiqué, sont strictement interdits pour l'exploitation de

l'émetteur

3.3 Japan

3.3.1 Notice for EVMs delivered in Japan: Please see http://www.tij.co.jp/lsds/ti_ja/general/eStore/notice_01.page 日本国内に

輸入される評価用キット、ボードについては、次のところをご覧ください。

http://www.tij.co.jp/lsds/ti_ja/general/eStore/notice_01.page

3.3.2 Notice for Users of EVMs Considered “Radio Frequency Products” in Japan: EVMs entering Japan may not be certified

by TI as conforming to Technical Regulations of Radio Law of Japan.

If User uses EVMs in Japan, not certified to Technical Regulations of Radio Law of Japan, User is required by Radio Law of

Japan to follow the instructions below with respect to EVMs:

1. Use EVMs in a shielded room or any other test facility as defined in the notification #173 issued by Ministry of Internal

Affairs and Communications on March 28, 2006, based on Sub-section 1.1 of Article 6 of the Ministry’s Rule for

Enforcement of Radio Law of Japan,

2. Use EVMs only after User obtains the license of Test Radio Station as provided in Radio Law of Japan with respect to

EVMs, or

3. Use of EVMs only after User obtains the Technical Regulations Conformity Certification as provided in Radio Law of Japan

with respect to EVMs. Also, do not transfer EVMs, unless User gives the same notice above to the transferee. Please note

that if User does not follow the instructions above, User will be subject to penalties of Radio Law of Japan.

SPACER

【無線電波を送信する製品の開発キットをお使いになる際の注意事項】開発キットの中には技術基準適合証明を受けて

いないものがあります。技術適合証明を受けていないもののご使用に際しては、電波法遵守のため、以下のいずれかの

措置を取っていただく必要がありますのでご注意ください。

1. 電波法施行規則第6条第1項第1号に基づく平成18年3月28日総務省告示第173号で定められた電波暗室等の試験設備でご使用

いただく。

2. 実験局の免許を取得後ご使用いただく。

3. 技術基準適合証明を取得後ご使用いただく。

なお、本製品は、上記の「ご使用にあたっての注意」を譲渡先、移転先に通知しない限り、譲渡、移転できないものとします。

上記を遵守頂けない場合は、電波法の罰則が適用される可能性があることをご留意ください。日本テキサス・イ

ンスツルメンツ株式会社

東京都新宿区西新宿６丁目２４番１号

西新宿三井ビル

3.3.3 Notice for EVMs for Power Line Communication: Please see http://www.tij.co.jp/lsds/ti_ja/general/eStore/notice_02.page

電力線搬送波通信についての開発キットをお使いになる際の注意事項については、次のところをご覧くださ

い。http://www.tij.co.jp/lsds/ti_ja/general/eStore/notice_02.page

SPACER

4EVM Use Restrictions and Warnings:

4.1 EVMS ARE NOT FOR USE IN FUNCTIONAL SAFETY AND/OR SAFETY CRITICAL EVALUATIONS, INCLUDING BUT NOT

LIMITED TO EVALUATIONS OF LIFE SUPPORT APPLICATIONS.

4.2 User must read and apply the user guide and other available documentation provided by TI regarding the EVM prior to handling

or using the EVM, including without limitation any warning or restriction notices. The notices contain important safety information

related to, for example, temperatures and voltages.

4.3 Safety-Related Warnings and Restrictions:

4.3.1 User shall operate the EVM within TI’s recommended specifications and environmental considerations stated in the user

guide, other available documentation provided by TI, and any other applicable requirements and employ reasonable and

customary safeguards. Exceeding the specified performance ratings and specifications (including but not limited to input

and output voltage, current, power, and environmental ranges) for the EVM may cause personal injury or death, or

property damage. If there are questions concerning performance ratings and specifications, User should contact a TI

field representative prior to connecting interface electronics including input power and intended loads. Any loads applied

outside of the specified output range may also result in unintended and/or inaccurate operation and/or possible

permanent damage to the EVM and/or interface electronics. Please consult the EVM user guide prior to connecting any

load to the EVM output. If there is uncertainty as to the load specification, please contact a TI field representative.

During normal operation, even with the inputs and outputs kept within the specified allowable ranges, some circuit

components may have elevated case temperatures. These components include but are not limited to linear regulators,

switching transistors, pass transistors, current sense resistors, and heat sinks, which can be identified using the

information in the associated documentation. When working with the EVM, please be aware that the EVM may become

very warm.

4.3.2 EVMs are intended solely for use by technically qualified, professional electronics experts who are familiar with the

dangers and application risks associated with handling electrical mechanical components, systems, and subsystems.

User assumes all responsibility and liability for proper and safe handling and use of the EVM by User or its employees,

affiliates, contractors or designees. User assumes all responsibility and liability to ensure that any interfaces (electronic

and/or mechanical) between the EVM and any human body are designed with suitable isolation and means to safely

limit accessible leakage currents to minimize the risk of electrical shock hazard. User assumes all responsibility and

liability for any improper or unsafe handling or use of the EVM by User or its employees, affiliates, contractors or

designees.

4.4 User assumes all responsibility and liability to determine whether the EVM is subject to any applicable international, federal,

state, or local laws and regulations related to User’s handling and use of the EVM and, if applicable, User assumes all

responsibility and liability for compliance in all respects with such laws and regulations. User assumes all responsibility and

liability for proper disposal and recycling of the EVM consistent with all applicable international, federal, state, and local

requirements.

5. Accuracy of Information: To the extent TI provides information on the availability and function of EVMs, TI attempts to be as accurate

as possible. However, TI does not warrant the accuracy of EVM descriptions, EVM availability or other information on its websites as

accurate, complete, reliable, current, or error-free.

SPACER

6. Disclaimers:

6.1 EXCEPT AS SET FORTH ABOVE, EVMS AND ANY WRITTEN DESIGN MATERIALS PROVIDED WITH THE EVM (AND THE

DESIGN OF THE EVM ITSELF) ARE PROVIDED "AS IS" AND "WITH ALL FAULTS." TI DISCLAIMS ALL OTHER

WARRANTIES, EXPRESS OR IMPLIED, REGARDING SUCH ITEMS, INCLUDING BUT NOT LIMITED TO ANY IMPLIED

WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT OF ANY

THIRD PARTY PATENTS, COPYRIGHTS, TRADE SECRETS OR OTHER INTELLECTUAL PROPERTY RIGHTS.

6.2 EXCEPT FOR THE LIMITED RIGHT TO USE THE EVM SET FORTH HEREIN, NOTHING IN THESE TERMS AND

CONDITIONS SHALL BE CONSTRUED AS GRANTING OR CONFERRING ANY RIGHTS BY LICENSE, PATENT, OR ANY

OTHER INDUSTRIAL OR INTELLECTUAL PROPERTY RIGHT OF TI, ITS SUPPLIERS/LICENSORS OR ANY OTHER THIRD

PARTY, TO USE THE EVM IN ANY FINISHED END-USER OR READY-TO-USE FINAL PRODUCT, OR FOR ANY

INVENTION, DISCOVERY OR IMPROVEMENT MADE, CONCEIVED OR ACQUIRED PRIOR TO OR AFTER DELIVERY OF

THE EVM.

7. USER'S INDEMNITY OBLIGATIONS AND REPRESENTATIONS. USER WILL DEFEND, INDEMNIFY AND HOLD TI, ITS

LICENSORS AND THEIR REPRESENTATIVES HARMLESS FROM AND AGAINST ANY AND ALL CLAIMS, DAMAGES, LOSSES,

EXPENSES, COSTS AND LIABILITIES (COLLECTIVELY, "CLAIMS") ARISING OUT OF OR IN CONNECTION WITH ANY

HANDLING OR USE OF THE EVM THAT IS NOT IN ACCORDANCE WITH THESE TERMS AND CONDITIONS. THIS OBLIGATION

SHALL APPLY WHETHER CLAIMS ARISE UNDER STATUTE, REGULATION, OR THE LAW OF TORT, CONTRACT OR ANY

OTHER LEGAL THEORY, AND EVEN IF THE EVM FAILS TO PERFORM AS DESCRIBED OR EXPECTED.

8. Limitations on Damages and Liability:

8.1 General Limitations. IN NO EVENT SHALL TI BE LIABLE FOR ANY SPECIAL, COLLATERAL, INDIRECT, PUNITIVE,

INCIDENTAL, CONSEQUENTIAL, OR EXEMPLARY DAMAGES IN CONNECTION WITH OR ARISING OUT OF THESE

TERMS ANDCONDITIONS OR THE USE OF THE EVMS PROVIDED HEREUNDER, REGARDLESS OF WHETHER TI HAS

BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. EXCLUDED DAMAGES INCLUDE, BUT ARE NOT LIMITED

TO, COST OF REMOVAL OR REINSTALLATION, ANCILLARY COSTS TO THE PROCUREMENT OF SUBSTITUTE GOODS

OR SERVICES, RETESTING, OUTSIDE COMPUTER TIME, LABOR COSTS, LOSS OF GOODWILL, LOSS OF PROFITS,

LOSS OF SAVINGS, LOSS OF USE, LOSS OF DATA, OR BUSINESS INTERRUPTION. NO CLAIM, SUIT OR ACTION SHALL

BE BROUGHT AGAINST TI MORE THAN ONE YEAR AFTER THE RELATED CAUSE OF ACTION HAS OCCURRED.

8.2 Specific Limitations. IN NO EVENT SHALL TI'S AGGREGATE LIABILITY FROM ANY WARRANTY OR OTHER OBLIGATION

ARISING OUT OF OR IN CONNECTION WITH THESE TERMS AND CONDITIONS, OR ANY USE OF ANY TI EVM

PROVIDED HEREUNDER, EXCEED THE TOTAL AMOUNT PAID TO TI FOR THE PARTICULAR UNITS SOLD UNDER

THESE TERMS AND CONDITIONS WITH RESPECT TO WHICH LOSSES OR DAMAGES ARE CLAIMED. THE EXISTENCE

OF MORE THAN ONE CLAIM AGAINST THE PARTICULAR UNITS SOLD TO USER UNDER THESE TERMS AND

CONDITIONS SHALL NOT ENLARGE OR EXTEND THIS LIMIT.

9. Return Policy. Except as otherwise provided, TI does not offer any refunds, returns, or exchanges. Furthermore, no return of EVM(s)

will be accepted if the package has been opened and no return of the EVM(s) will be accepted if they are damaged or otherwise not in

a resalable condition. If User feels it has been incorrectly charged for the EVM(s) it ordered or that delivery violates the applicable

order, User should contact TI. All refunds will be made in full within thirty (30) working days from the return of the components(s),

excluding any postage or packaging costs.

10. Governing Law: These terms and conditions shall be governed by and interpreted in accordance with the laws of the State of Texas,

without reference to conflict-of-laws principles. User agrees that non-exclusive jurisdiction for any dispute arising out of or relating to

these terms and conditions lies within courts located in the State of Texas and consents to venue in Dallas County, Texas.

Notwithstanding the foregoing, any judgment may be enforced in any United States or foreign court, and TI may seek injunctive relief

in any United States or foreign court.

Mailing Address: Texas Instruments, Post Office Box 655303, Dallas, Texas 75265

spacer

IMPORTANT NOTICE

Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, enhancements, improvements and other

changes to its semiconductor products and services per JESD46, latest issue, and to discontinue any product or service per JESD48, latest

issue. Buyers should obtain the latest relevant information before placing orders and should verify that such information is current and

complete. All semiconductor products (also referred to herein as “components”) are sold subject to TI’s terms and conditions of sale

supplied at the time of order acknowledgment.

TI warrants performance of its components to the specifications applicable at the time of sale, in accordance with the warranty in TI’s terms

and conditions of sale of semiconductor products. Testing and other quality control techniques are used to the extent TI deems necessary

to support this warranty. Except where mandated by applicable law, testing of all parameters of each component is not necessarily

performed.

TI assumes no liability for applications assistance or the design of Buyers’ products. Buyers are responsible for their products and

applications using TI components. To minimize the risks associated with Buyers’ products and applications, Buyers should provide

adequate design and operating safeguards.

TI does not warrant or represent that any license, either express or implied, is granted under any patent right, copyright, mask work right, or

other intellectual property right relating to any combination, machine, or process in which TI components or services are used. Information

published by TI regarding third-party products or services does not constitute a license to use such products or services or a warranty or

endorsement thereof. Use of such information may require a license from a third party under the patents or other intellectual property of the

third party, or a license from TI under the patents or other intellectual property of TI.

Reproduction of significant portions of TI information in TI data books or data sheets is permissible only if reproduction is without alteration

and is accompanied by all associated warranties, conditions, limitations, and notices. TI is not responsible or liable for such altered

documentation. Information of third parties may be subject to additional restrictions.

Resale of TI components or services with statements different from or beyond the parameters stated by TI for that component or service

voids all express and any implied warranties for the associated TI component or service and is an unfair and deceptive business practice.

TI is not responsible or liable for any such statements.

Buyer acknowledges and agrees that it is solely responsible for compliance with all legal, regulatory and safety-related requirements

concerning its products, and any use of TI components in its applications, notwithstanding any applications-related information or support

that may be provided by TI. Buyer represents and agrees that it has all the necessary expertise to create and implement safeguards which

anticipate dangerous consequences of failures, monitor failures and their consequences, lessen the likelihood of failures that might cause

harm and take appropriate remedial actions. Buyer will fully indemnify TI and its representatives against any damages arising out of the use

of any TI components in safety-critical applications.

In some cases, TI components may be promoted specifically to facilitate safety-related applications. With such components, TI’s goal is to

help enable customers to design and create their own end-product solutions that meet applicable functional safety standards and

requirements. Nonetheless, such components are subject to these terms.

No TI components are authorized for use in FDA Class III (or similar life-critical medical equipment) unless authorized officers of the parties

have executed a special agreement specifically governing such use.

Only those TI components which TI has specifically designated as military grade or “enhanced plastic” are designed and intended for use in

military/aerospace applications or environments. Buyer acknowledges and agrees that any military or aerospace use of TI components

which have not been so designated is solely at the Buyer's risk, and that Buyer is solely responsible for compliance with all legal and

regulatory requirements in connection with such use.

TI has specifically designated certain components as meeting ISO/TS16949 requirements, mainly for automotive use. In any case of use of

non-designated products, TI will not be responsible for any failure to meet ISO/TS16949.

Products Applications

Audio www.ti.com/audio Automotive and Transportation www.ti.com/automotive

Amplifiers amplifier.ti.com Communications and Telecom www.ti.com/communications

Data Converters dataconverter.ti.com Computers and Peripherals www.ti.com/computers

DLP® Products www.dlp.com Consumer Electronics www.ti.com/consumer-apps

DSP dsp.ti.com Energy and Lighting www.ti.com/energy

Clocks and Timers www.ti.com/clocks Industrial www.ti.com/industrial

Interface interface.ti.com Medical www.ti.com/medical

Logic logic.ti.com Security www.ti.com/security

Power Mgmt power.ti.com Space, Avionics and Defense www.ti.com/space-avionics-defense

Microcontrollers microcontroller.ti.com Video and Imaging www.ti.com/video

RFID www.ti-rfid.com

OMAP Applications Processors www.ti.com/omap TI E2E Community e2e.ti.com

Wireless Connectivity www.ti.com/wirelessconnectivity

Mailing Address: Texas Instruments, Post Office Box 655303, Dallas, Texas 75265

Datenblatt für LP55231 Eval Board User Guide von Texas Instruments

INFORMATION

HILFE

KONTAKT

FOLGEN SIE UNS