STMPE2401 datasheet(36/55 Pages) STMICROELECTRONICS

No de pièce	STMPE2401

Description	24-bit Enhanced port expander with Keypad and PWM controller Xpander logic

PDF	55 Pages

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Fabricant	STMICROELECTRONICS [STMicroelectronics]

Site Internet	http://www.st.com

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PWM controller

STMPE2401

36/55

11.3

PWM instruction channel x (PWMICx)

This PWMICx is the dataport that allows the instructions to be loaded into the PWM

channel. The loading of the instructions is achieved by continuously writing to this dataport.

As this dataport address falls on the non-auto increment region, continuous write operation

on I2C will write into the same dataport address. The ‘x’ value is from 0 to 2 as there are 3

independent PWM channels. To access these dataports, the corresponding ENx in the

PWMCS register must be set to 0 first to put the PWM channel in reset state.

Bit

6543210

IB7

IB6

IB5

IB4

IB3

IB2

IB1

IB0

Read/Write

Reset Value 0

0000000

Table 33. Pin description

Bits

Name

Description

7:0

IB[x]

PWM Instruction Channel x, where x is 7 to 0

As an instruction is 16-bit width, writing the instruction into this 8-bit

PWMICx dataport requires two 8-bit data write. The most significant byte

of the 16-bit instruction is to be written in first and followed by the least

significant byte of the instruction. The same effect applies to the read

operation.

STMPE2401 Fiches technique(PDF) 36 Page - STMicroelectronics