ARTERY AT32F421C8T7 - SCFG External Interrupt Configuration Register1 (SCFG_ EXINTC1)

AT32F421 Series Reference Manual
2022.11.11 Page 92 Rev 2.02
channel 1)
1: Remap (ADC DMA request is mapped on DMA
channel 2.
Bit 7: 6
IR_SRC_SEL
0x0
rw
Infrared modulation envelope signal source selection
This field is used to select the infrared modulation
envelope signal source.
00: TMR16
01: USART1
10: USART2
11: Reserved
Bit 5
IR_POL
0x0
rw
Infrared output polarity selection
0: Infrared output (IR_OUT) is not inversed
1: Infrared output (IR_OUT) is inversed
Bit 4
PA11_12_RMP
0x0
rw
PA11 and PA12 remap on small packages (20 pins)
This bit is set and cleared by software. It controls the
remapping of PA9/10 or PA11/12 on small packages.
0: No remap (PA9/PA10 corresponds to PA9/PA10)
1: Remap (PA11/PA12 is mapped on PA9/PA10)
Bit 3: 2
Reserved
0xX
resd
Kept at its default value.
Bit 1: 0
MEM_MAP_SEL
0xX
rw
Boot mode status bit
These bits are read-only, indicating from which memory
to boot after reset.
X0: Boot from main memory
01: Boot from bootloader memory
11: Boot from internal SRAM.
7.2.2 SCFG external interrupt configuration register1 (SCFG_
EXINTC1)
Bit
Register
Reset value
Type
Description
Bit 31: 16
Reserved
0x0000
resd
Kept at its default value.
Bit 15: 12
EXINT3
0x0000
rw
EXINT3 input source configuration
These bits can be read/written by software. They are
used to select the input source for the EXINT3 external
interrupt.
0000: PA[3]
0001: PB[3]
Bit 11: 8
EXINT2
0x0000
rw
EXINT2 input source configuration
These bits can be read/written by software. They are
used to select the input source for the EXINT2 external
interrupt.
0000: PA[2]
0001: PB[2]
Bit 7: 4
EXINT1
0x0000
rw
EXINT1 input source configuration
These bits can be read/written by software. They are
used to select the input source for the EXINT1 external
interrupt.
0000: PA[1]
0001: PB[1]
0101: PF[1]
Bit 3: 0
EXINT0
0x0000
rw
EXINT0 input source configuration
These bits can be read/written by software. They are
used to select the input source for the EXINT0 external
interrupt.
0000: PA[0]
0001: PB[0]
0101: PF[0]