STMPE821_09 datasheet(24/55 Pages) STMICROELECTRONICS

Nome de Peças	STMPE821

Descrição Electrónicos	8-channel capacitive touch key controller

PDF	55 Pages

Scroll/Zoom	100%

Fabricante Electrônico	STMICROELECTRONICS [STMicroelectronics]

Página de início	http://www.st.com

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GPIO controller

STMPE821

24/55

GPIO controller

A total of 8 GPIOs are available in the STMPE821. The GPIO controller contains the

registers that allow the host system to configure each of the pins into either a GPIO, direct

output of a TOUCH channel or a PWM output. Unused GPIOs should be configured as

outputs to minimize the power consumption.

A group of registers is used to control the exact function of each of the 8 GPIOs. The

registers and their respective address is listed in the following table.

All GPIO registers are named as GPxx, where:

Xxx represents the functional group

For LSB registers:

For MSB registers:

Table 8.

GPIO controller registers summary map

Address

Description

Auto-increment

0x10

GPIO_MR_LSB

GPIO monitor pin state

YES

0x11

GPIO_MR_MSB

0x12

GPIO_SET_LSB

GPIO set pin state

YES

0x13

GPIO_SET_MSB

0x14

GPIO_DIR_LSB

GPIO set pin direction

YES

0x15

GPIO_DIR_MSB

0x16

GPIO_FUNCT_LSB

GPIO function register

YES

0x17

GPIO_FUNCT_MSB

543

IO-7

IO-6

IO-5

IO-4

IO-3

IO-2

IO-1

IO-0

543

RESERVED

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