GigaDevice Semiconductor GD32F3x0 - EXTI Sources Selection Register 0 (SYSCFG_EXTISS0)

GD32F3x0 User Manual
32
9
USART0_TX_DMA_
RMP
USART0_TX DMA request remapping enable
0: Not remap (USART0_TX DMA requests are mapped on DMA channel 1)
1: Remap (USART0_TX DMA requests are mapped on DMA channel 3)
8
ADC_DMA_RMP
ADC DMA request remapping enable
0: Not remap (ADC DMA requests are mapped on DMA channel 0)
1: Remap (ADC DMA requests are mapped on DMA channel 1)
7:2
Reserved
Must be kept at reset value.
1:0
BOOT_MODE[1:0]
Boot mode (Refer to Chapter 1.4 Boot configuration for details)
Bit0 is mapping to the BOOT0 pin; the value of bit1 is the opposite of the BOOT1_n
option bit value.
x0: Boot from the Main Flash
01: Boot from the system memory
11: Boot from the embedded SRAM
1.6.2. EXTI sources selection register 0 (SYSCFG_EXTISS0)
Address offset: 0x08
Reset value: 0x0000 0000
This register has to be accessed by word (32-bit).
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
Reserved
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
EXTI3_SS [3:0]
EXTI2_SS [3:0]
EXTI1_SS [3:0]
EXTI0_SS [3:0]
rw
rw
rw
rw
Bits
Fields
Descriptions
31:16
Reserved
Must be kept at reset value.
15:12
EXTI3_SS[3:0]
EXTI 3 sources selection
X000: PA3 pin
X001: PB3 pin
X010: PC3 pin
X011: Reserved
X100: Reserved
X101: Reserved
X110: Reserved
X111: Reserved
11:8
EXTI2_SS[3:0]
EXTI 2 sources selection
X000: PA2 pin
X001: PB2 pin