STMPE1601 datasheet(30/61 Pages) STMICROELECTRONICS

Part #	STMPE1601

Description	16-bit enhanced port expander with keypad and PWM controller Xpander Logic

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

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GPIO controller

STMPE1601

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10

GPIO controller

A total of 16 GPIOs are available in the STMPE1601 port expander IC. 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 19.

GPIO controller

Offset address

Register name

Description

Auto-increment

(during sequential R/W)

0x02

GPIO_SET_MSB

GPIO set pin state register

Yes

0x03

GPIO_SET_LSB

Yes

0x04

GPIO_CLR_msb

GPIO clear pin state register

Yes

0x05

GPIO_CLR_LSB

Yes

0x06

GP_MP_MSB

GPIO monitor pin state register

Yes

0x07

GPIO_MP_LSB

Yes

0x08

GPIO_SET_DIR_MSB

GPIO set pin direction register

Yes

0x09

GPIO_SET_DIR_LSB

Yes

0x0A

GPIO_ED_MSB

GPIO edge detect status

register

Yes

0x0B

GPIO_ED_LSB

Yes

0x0C

GPIO_RE_MSB

GPIO rising edge register

Yes

0x0D

GPIO_RE_LSB

Yes

0x0E

GPIO_FE_MSB

GPIO falling edge register

Yes

0x0F

GPIO_FE_LSB

Yes

0x10

GPIO_PULL_UP_MS

B

GPIO pull up register

Yes

0x11

GPIO_PULL_UP_LSB

Yes

0x12

GPIO_AF_U_MSB

GPIO alternate function

register (upper word)

Yes

0x13

GPIO_AF_U_MSB

Yes

0x14

GPIO_AF_L_MSB

GPIO alternate function

register (lower word)

Yes

0x15

GPIO_AF_L_LSB

Yes

0x16

GPIO_LT_EN

GPIO level translator enable

Yes

0x17

GPIO_LT_DIR

GPIO level translator direction

Yes

0x18-1F

RESERVED

Reserved

Yes

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