LP5521 datasheet(26/51 Pages) TI2

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LP5521

SNVS441I – JANUARY 2007 – REVISED NOVEMBER 2016

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7.5.3.2 Set PWM

Set PWM output value from 0 to 255. Command takes sixteen 32 kHz clock cycles (= 488 μs). Setting register

00H bit LOG_EN sets the scale from linear to logarithmic.

Table 16. Set PWM Command

PWM value

7.5.3.3 Go to Start

Go to start command resets Program Counter register and continues executing program from the 00H location.

Command takes sixteen 32 kHz clock cycles. Note that default value for all program memory registers is 0000H,

which is Go to start command.

Go to start command

7.5.3.4 Branch

When branch command is executed, the 'step number' value is loaded to PC and program execution continues

from this location. Looping is done by the number defined in loop count parameter. Nested looping is supported

(loop inside loop). The number of nested loops is not limited. Command takes sixteen 32-kHz clock cycles.

Table 17. Branch Command

Loop count

Step number

NAME

VALUE(d)

DESCRIPTION

loop count

0-63

The number of loops to be done. 0 means infinite loop.

step number

0-15

The step number to be loaded to program counter.

7.5.3.5 End

End program execution, resets the program counter and sets the corresponding EXEC register to 00b (hold).

Command takes sixteen 32-kHz clock cycles.

Table 18. End Command

int

reset

NAME

VALUE

DESCRIPTION

int

No interrupt will be sent.

Send interrupt to processor by pulling the INT pin down and setting corresponding status

interrupt status register 0CH.

reset

Keep the current PWM value.

Set PWM value to 0.

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