Datasheet

ManualsBrandsTEXAS INSTRUMENTS ManualsDev KitsPCB design board

3. Instruction Set Details

This section provides the syntax with detailed examples for all the LP5523 instructions supported by the LASM assembler.

LED DRIVER INSTRUCTIONS

INSTRUCTION SYNTAX

FUNCTION EXAMPLE 16-BIT ASSEMBLED

BIT SEQUENCE

ASSEMBLED

CODE HEX

ramp time, PWM Output PWM with

increasing / decreasing

duty cycle.

ramp 0.6, 255 0000 1010 1111 1111 0A FF

Time is a positive constant

(0.000484*PWM to

0.484*PWM);

;Ramp up to full scale over 0.6s

PWM is a positive or negative

constant (-255 to 255).

ramp 1.2,-255 0001 0101 1111 1111 15 FF

Note: time is rounded by

assembler if needed.

;Ramp down to zero over 1.2s

ramp var1, prescale, var2 Output PWM with

increasing / decreasing

duty cycle.

ld ra, 31 1000 0100 0000 0001 84 01

Var1 is a variable (ra, rb, rc, rd); ld rb, 255

Prescale is a boolean constant

(pre=0 or pre=1);

ramp ra, pre=0,+rb

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

PWM output.

set_pwm 128 0100 0000 1000 0000 4080

PWM is a constant (0-255 or 0

- FFh).

;Set PWM Duty-Cycle to 50%

set_pwm var1 Generate a continuous

PWM output.

ld rc, 128 1000 0100 0110 0010 8462

Var1 is a variable (ra, rb, rc, rd). set_pwm rc

;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

to 0.484).

;Wait 0.25 seconds

Note: time is rounded by

assembler if needed.

AN-2227 - LP5523 Evaluation Kit