STM32W108HB datasheet(46/179 Pages) STMICROELECTRONICS

номер детали	STM32W108HB

подробное описание детали	High-performance, IEEE 802.15.4 wireless system-on-chip

PDF	179 Pages

Scroll/Zoom	100%

производитель	STMICROELECTRONICS [STMicroelectronics]

домашняя страница	http://www.st.com

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General-purpose input/outputs

STM32W108CB, STM32W108HB

46/179

Doc ID 16252 Rev 2

General-purpose input/outputs

The STM32W108 has 24 multi-purpose GPIO pins that may be individually configured as:

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General purpose output

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General purpose open-drain output

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Alternate output controlled by a peripheral device

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Alternate open-drain output controlled by a peripheral device

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Analog

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General purpose input

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General purpose input with pull-up or pull-down resistor

The basic structure of a single GPIO is illustrated in Figure 8.

Figure 8.

GPIO block diagram

A Schmitt trigger converts the GPIO pin voltage to a digital input value. The digital input

signal is then always routed to the GPIO_PxIN register; to the alternate inputs of associated

peripheral devices; to wake detection logic if wake detection is enabled; and, for certain

pins, to interrupt generation logic. Configuring a pin in analog mode disconnects the digital

input from the pin and applies a high logic level to the input of the Schmitt trigger.

Only one device at a time can control a GPIO output. The output is controlled in normal

output mode by the GPIO_PxOUT register and in alternate output mode by a peripheral

device. When in input mode or analog mode, digital output is disabled.

6.1

Functional description

6.1.1

GPIO ports

The 24 GPIO pins are grouped into three ports: PA, PB, and PC. Individual GPIOs within a

port are numbered 0 to 7 according to their bit positions within the GPIO registers.

STM32W108HB датащи(PDF) 46 Page - STMicroelectronics