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RM0008
9.5
GPIO and AFIO register maps
Refer to
the GPIO and AFIO register map and the reset values.
Table 59.
GPIO register map and reset values
Offset Register
CNF7
GPIOx_CRL
[1:0]
0x00
Reset value
0 1
CNF
GPIOx_CRH
15
0x04
[1:0]
Reset value
0 1
GPIOx_IDR
0x08
Reset value
GPIOx_ODR
0x0C
Reset value
GPIOx_BSRR
0x10
Reset value
0 0
GPIOx_BRR
0x14
Reset value
GPIOx_LCKR
0x18
Reset value
Table 60.
AFIO register map and reset values
Offset
Register
AFIO_EVCR
0x00
Reset value
AFIO_MAPR
low-, medium-,
0x04
high- and XL-
density devices
Reset value
AFIO_MAPR
connectivity line
0x04
devices
Reset value
AFIO_EXTICR1
0x08
Reset value
AFIO_EXTICR2
0x0C
Reset value
General-purpose and alternate-function I/Os (GPIOs and AFIOs)
Table 3 on page 50
for the register boundary addresses. The following tables give
MODE7
CNF6
MODE6
CNF5
[1:0]
[1:0]
[1:0]
[1:0]
0
0
0 1
0
0
0 1
MODE1
CNF
MODE1
CNF
5
14
4
13
[1:0]
[1:0]
[1:0]
[1:0]
0
0
0 1
0
0
0 1
Reserved
Reserved
BR[15:0]
0
0
0 0
0
0
0 0
Reserved
Reserved
Reserved
Reserved
0
0
0
0
0
0
0
0
0
0
Reserved
Reserved
Doc ID 13902 Rev 12
MODE5
CNF4
MODE4
CNF3
[1:0]
[1:0]
[1:0]
[1:0]
0
0
0 1
0
0
0 1
MODE1
CNF
MODE1
CNF
3
12
2
11
[1:0]
[1:0]
[1:0]
[1:0]
0
0
0 1
0
0
0 1
0 0
0 0
0
0
0 0
0
0
0 0
0 0
0
0 0
Reserved
0
0
0
0
0
0
0
0
0
0
EXTI3[3:0]
0
EXTI7[3:0]
0
MODE3
CNF2
MODE2
CNF1
[1:0]
[1:0]
[1:0]
[1:0]
0
0
0 1
0
0
0 1
MODE1
CNF
MODE1
CNF
1
10
0
9
[1:0]
[1:0]
[1:0]
[1:0]
0
0
0 1
0
0
0 1
IDR[15:0]l
0
0
0 0
0
0
0 0
ODR[15:0]
0
0
0 0
0
0
0 0
BSR[15:0]
0
0
0 0
0
0
0 0
BR[15:0]
0
0
0 0
0
0
0 0
LCK[15:0]
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
EXTI2[3:0]
EXTI1[3:0]
0
0
0
0
0
0
0
0
0
EXTI6[3:0]
EXTI5[3:0]
0
0
0
0
0
0
0
0
0
MODE1
CNF0
MODE0
[1:0]
[1:0]
[1:0]
0
0
0 1
0
0
CNF
MODE9
MODE8
8
[1:0]
[1:0]
[1:0]
0
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
PORT[2:0] PIN[3:0]
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
EXTI0[3:0]
0
0
0
0
0
0
EXTI4[3:0]
0
0
0
0
0
0
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