UM0306 Reset and clock control (RCC)
61/519
Bit 5
IOPDRST IO port D reset
Set and reset by software.
0: No effect
1: Reset I/O port D
Bit 4
IOPCRST IO port C reset
Set and reset by software.
0: No effect
1: Reset I/O port C
Bit 3
IOPBRST IO port B reset
Set and reset by software.
0: No effect
1:Reset I/O port B
Bit 2
IOPARST I/O port A reset
Set and reset by software.
0: No effect
1: Reset I/O port A
Bit 1 Reserved, always read as 0.
Bit 0
AFIORST Alternate Function I/O reset
Set and reset by software.
0: No effect
1: Reset Alternate Function