STMPE16M31PX datasheet(38/75 Pages) STMICROELECTRONICS

38 / 75 page

PWM controller

STMPE16M31PX

38/75

Doc ID 17058 Rev 2

PWM controller

The PWM controller allows to control the brightness, ramping/fading and blinking of LEDs.

The STMPE16M31PX features 8 independent PWM controllers.

The PWM controllers outputs are connected to the GPIO through the PWM array controller.

The PAC provides the following list of flexibility to the overall PWM’s system:

–

Each GPIO may utilize the output of 1 of the 8 PWM controllers.

–

Up to 16 GPIO may be controlled by the same PWM at the same time.

–

Each of the PWM could be programmed to be triggered by a touch sensing input.

Note:

The PWM cannot be programmed to be triggered by a proximity sensing input.

The PWM controller uses a base clock of 512 kHz, clock pulses have a variable duty cycle

of 0 to 100% in 16 steps. The PWM’s frequency is 32 kHz (to be out of audio range).

11.1

PWM function register map

This section lists and describes the PWM function registers of the STMPE16M31PX device,

starting with a register map and then provides detailed descriptions of register types.

Table 12.

PWM function registers

Address

Reset value

R/W

Description

0x30

PWM_MATER_EN

0x00

PWM master enable

0x40

PWM_0_SET

0x00

PWM0 setup

0x41

PWM_0_CTRL

0x00

PWM0 control

0x42

PWM_0_RAMP

0x00

PWM0 ramp rate

0x43

PWM_0_TRIG

0x00

PWM0 trigger

0x44

PWM_1_SET

0x00

PWM1 setup

0x45

PWM_1_CTRL

0x00

PWM1 control

0x46

PWM_1_RAMP

0x00

PWM1 ramp rate

0x47

PWM_1_TRIG

0x00

PWM1 trigger

0x48

PWM_2_SET

0x00

PWM2 setup

0x49

PWM_2_CTRL

0x00

PWM2 control

0x4A

PWM_2_RAMP

0x00

PWM2 ramp rate

0x4B

PWM_2_TRIG

0x00

PWM2 trigger

0x4C

PWM_3_SET

0x00

PWM3 setup

0x4D

PWM_3_CTRL

0x00

PWM3 control

0x4E

PWM_3_RAMP

0x00

PWM3 ramp rate

0x4F

PWM_3_TRIG

0x00

PWM3 trigger

Obsolete

Product(s)

- Obsolete

Product(s)

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