ST STM32F423 Reference Manual page 202

General-purpose I/Os (GPIO)
Offset Register
GPIOx_
OTYPER
0x04
(where x = A...H)
Reset value
GPIOx_
OSPEEDR
(where x =
0x08
C...H)
Reset value
GPIOA_
OSPEEDER
0x08
Reset value
GPIOB_
OSPEEDR
0x08
Reset value
GPIOA_PUPDR
0x0C
Reset value
GPIOB_PUPDR
0x0C
Reset value
GPIOx_PUPDR
(where x =
0x0C
C...H)
Reset value
GPIOx_IDR
(where x = A...H)
0x10
Reset value
GPIOx_ODR
(where x = A...H)
0x14
Reset value
GPIOx_BSRR
(where x = A...H)
0x18
Reset value
202/1324
Table 28. GPIO register map and reset values (continued)
0 0 0 0 0 0 0 0 0
0 0 0 0 1 1 0 0 0
0 0 0 0 0 0 0 0 0
0 1 1 0 0 1 0 0 0
0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0
0 0
0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0
x x
0 0
0 0 0 0 0 0 0 0 0
RM0430 Rev 8
0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 1 1 0
0 0 0 0 0 0 0 0 0
0 0 0 0 0 1 0 0 0
0 0 0 0 0 0 0 0 0
x x x x x x x x x
0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0
RM0430
0 0 0 0 0
0 0 0 0 0
0 0 0 0 0
0 0 0 0 0
0 0 0 0 0
0 0 0 0 0
0 0 0 0 0
x x x x x
0 0 0 0 0
0 0 0 0 0