Exti Source Selection Register 1 - Essr1 - Holtek HT32F50231 User Manual

32-Bit Arm ® Cortex ® -M0+ MCU
HT32F50231/HT32F50241
EXTI Source Selection Register 1 – ESSR1
This register specifies the I/O selection of EXTI8 ~ EXTI15.
Offset: 0x004
Reset value: 0x0000_0000
31
Type/Reset RW 0 RW
23
Type/Reset RW 0 RW
15
Type/Reset RW 0 RW
7
Type/Reset RW 0 RW
Bits Field
[31:0] EXTInPIN[3:0] EXTIn Pin Selection (n = 8 ~ 15)
Rev. 1.00
30 29 28
EXTI15PIN
0 RW 0 RW
22 21 20
EXTI13PIN
0 RW 0 RW
14 13 12
EXTI11PIN
0 RW 0 RW
6 5 4
EXTI9PIN
0 RW 0 RW
Descriptions
0000: PA Bit n is selected as EXTIn source signal
0001: PB Bit n is selected as EXTIn source signal
0010: PC Bit n is selected as EXTIn source signal
Others: Reserved
Note: Since not all GPIO pins are available in all products and package types,
refer to the pin assignment section for detailed pin information. The
EXTInPIN [3:0] field setting is invalid when the corresponding pin is not
available.
143 of 486
27 26
EXTI14PIN
0 RW 0 RW 0 RW
19 18
EXTI12PIN
0 RW 0 RW 0 RW
11 10
EXTI10PIN
0 RW 0 RW 0 RW
3 2
0 RW 0 RW 0 RW
25 24
0 RW 0
17 16
0 RW 0
9 8
0 RW 0
1 0
EXTI8PIN
0 RW 0
July 31, 2018