STMPE2401TBR STMicroelectronics, STMPE2401TBR Datasheet - Page 30

• Manufacturer Part Number: STMPE2401TBR
• Description: IC I/O EXPANDER I2C 24B 36TFBGA
• Manufacturer: STMicroelectronics

Specifications of STMPE2401TBR

• Interface: I²C
• Number Of I /o: 24
• Interrupt Output: Yes
• Frequency - Clock: 400kHz
• Voltage - Supply: 1.65 V ~ 1.95 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 36-TFBGA
• Includes: Keypad, POR, PWM
• For Use With: 497-6426 - BOARD EVAL BASED ON STMPE2401
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-6133-2

GPIO controller
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Table 28. Bit’s function
GPIO alternate function register (GPAFR)
GPAFR is to select the functionality of the GPIO pin. To select a function for a GPIO pin, a
bit-pair in the register (GPAFR_U or GPAFR_L) has to be set.
GPIO Edge Detect Status
GPIO Rising Edge
GPIO Falling Edge
GPIO Pull Up
GPIO Pull Down
Reset
Reset
Reset
Value
Value
Value
R/W
R/W
R/W
Bit
Bit
Bit
Register name
RW
RW
RW
23
15
0
0
7
0
AF23
AF19
AF15
RW
RW
RW
22
14
0
0
6
0
Set to ‘1’ by hardware when there is a rising/falling edge on the corre-
sponding GPIO. Writing ‘1’ clears the bit. Writing ‘0’ has no effect.
Set to ‘1’ to enable rising edge detection on the corresponding GPIO.
Set to ‘1’ to enable falling edge detection on the corresponding GPIO.
Set to ‘1’ to enable internal pull-up resistor
Set to ‘1’ to enable internal pull-down resistor
RW
RW
RW
21
13
0
0
5
0
AF22
AF18
AF14
GPAFR_U_msb
GPAFR_U_csb
RW
RW
GPAFR_U_lsb
RW
20
12
0
0
4
0
RW
RW
RW
Function
19
11
0
0
3
0
AF21
AF17
AF13
RW
RW
RW
18
10
0
0
2
0
RW
RW
RW
17
0
9
0
1
0
STMPE2401
AF20
AF16
AF12
RW
RW
RW
16
0
8
0
0
0