STMPE2401 datasheet(37/55 Pages) STMICROELECTRONICS

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STMPE2401

PWM commands

37/55

PWM commands

The STMPE2401 PWM Controller works as a simple MCU, with program space of 64

instructions and a simple instruction set. The instructions are all 16 bits in length. The 3

most significant bits are used to identify the commands.

Table 34. PWM commands

Instruction

Description

RAMP

This instruction starts the PWM counters and set the pwm_x_out with the

result from the counting.

Set Maximum

(SMAX)

Load the PWM counter with the value of 0xff and the pwm_x_out will result in

logic level low.

Set Minimum (SMIN) Load the PWM counter with the value of 0x0 and the pwm_x_out will result in

logic level high.

Go to Start (GTS)

Branch to the address 0x0 and execute from 0x0 and onwards.

BRANCH

Branch to a relative or an absolute address to execute with the looping

capability. There are 4 loop counters available and these allow 4 nested

loops.

END

End the instruction execution by resetting and interrupting to the host.

Trigger (TRIG)

Capable of waiting as well as sending triggers to another PWM channel.

Table 35. Identification of instructions

Instruction

Bit 15

Bit 14

Bit 13

Ramp

SetFullScale

SetMinimum

GoToStart

Branch

101

End

110

Trigger

111

Reserved

100

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