STMPE1801 datasheet(32/60 Pages) STMICROELECTRONICS

No. de pieza	STMPE1801

Descripción Electrónicos	Xpander Logic™ 18-bit enhanced port expander with keypad controller

PDF	60 Pages

Scroll/Zoom	100%

Fabricante Electrónico	STMICROELECTRONICS [STMicroelectronics]

Página de inicio	http://www.st.com

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32 / 60 page

GPIO controller

STMPE1801

32/60

Doc ID 17884 Rev 3

GPIO controller

A total of 18 GPIOs are available in the STMPE1801 port expander device. Most of the

GPIOs are sharing physical pins with 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 13.

GPIO controller registers

Address

Description

Auto-increment

(during sequential

R/W)

GPIO_SET_LOW

GPIO set pin state register

Yes

GPIO_SET_MID

Yes

GPIO_SET_HIGH

Yes

GPIO_CLR_LOW

GPIO clear pin state register

Yes

GPIO_CLR_MID

Yes

GPIO_CLR_HIGH

Yes

GPIO_MP_LOW

GPIO monitor pin state register

Yes

GPIO_MP_MID

Yes

GPIO_MP_HIGH

Yes

GPIO_SET_DIR_LOW

GPIO set pin direction register

Yes

GPIO_SET_DIR_MID

Yes

GPIO_SET_DIR_HIGH

Yes

GPIO_RE_LOW

GPIO rising edge register

Yes

GPIO_RE_MID

Yes

GPIO_RE_HIGH

Yes

GPIO_FE_LOW

GPIO falling edge register

Yes

GPIO_FE_MID

Yes

GPIO_FE_HIGH

Yes

GPIO_PULL_UP_LOW

GPIO pull up register

Yes

GPIO_PULL_UP_MID

Yes

GPIO_PULL_UP_HIGH

Yes

STMPE1801 Datasheet(PDF) 32 Page - STMicroelectronics

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