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STMPE2403 bảng dữ liệu(PDF) 34 Page - STMicroelectronics

tên linh kiện STMPE2403
Giải thích chi tiết về linh kiện  24-bit Enhanced port expander with Keypad and PWM controller Xpander logic
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STMPE2403 bảng dữ liệu(HTML) 34 Page - STMicroelectronics

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The function of each bit is shown in the following table:
Table 33. Bit function
Register Name
Function
GPIO Monitor Pin State
Reading this bit yields the current state of the bit. Writing has no
effect.
GPIO Set Pin State
Writing ‘1’ to this bit causes the corresponding GPIO to go to ‘1’
state. Writing ‘0’ has no effect.
GPIO Clear Pin State
Writing ‘1’ to this bit causes the corresponding GPIO to go to ‘0’
state. Writing ‘0’ has no effect.
GPIO Set Pin Direction
‘0’ sets the corresponding GPIO to input state, and ‘1’ sets it to
output state
GPIO Edge Detect Status
Set to ‘1’ by hardware when there is a rising/falling edge on the
corresponding GPIO. Writing ‘1’ clears the bit. Writing ‘0’ has no
effect.
GPIO Rising Edge
Set to ‘1’ to enable rising edge detection on the corresponding
GPIO.
GPIO Falling Edge
Set to ‘1’ to enable falling edge detection on the corresponding
GPIO.
GPIO Pull Up
Set to ‘1’ to enable internal pull-up resistor
GPIO Pull Down
Set to ‘1’ to enable internal pull-down resistor



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