STMPE24M31 datasheet(33/85 Pages) STMICROELECTRONICS

33 / 85 page

STMPE16M31, STMPE24M31

GPIO controller

Doc ID 16174 Rev 4

33/85

GPIO controller

A total of 16 GPIOs are available in the STMPE24M31/STMPE16M31. Most of the GPIOs

are sharing physical pins with some alternate functions. The GPIO controller contains the

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

of the alternate functions. Unused GPIOs should be configured as outputs to minimize the

power consumption.

Table 11.

GPIO controller registers

GPIO_DIR

GPIO direction register

Address:

0x10 – 0x11

Type:

Reset:

0x00

Description:

Direction setting of the GPIO.

LSB (0x10)

MSB (0x11)

Address

Reset value

R/W

Description

0x10

GPDR

0X0000

R/W

GPIO direction register

0x12

GPMR

0X0000

R/W

GPOIO monitor pin state register

0x14

GPSR

0X0000

R/W

GPIO set pin register

0x16

GPFR

0X0000

R/W

GPIO alternate function register

543

210

IO-7

IO-6

IO-5

IO-4

IO-3

IO-2

IO-1

IO-0

000

543

210

IO-15

IO-14

IO-13

IO-12

IO-11

IO-10

IO-9

IO-8

000

[7:0] IO - X

Write ‘1’ to a bit to set the corresponding I/O to output.

Write ‘0’ to a bit to set the corresponding I/O to input.

Obsolete

Product(s)

- Obsolete

Product(s)

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