Gpio And Afio Register Maps; Gpio Register Map; Afio Register Map; Table 25. Gpio Register Map And Reset Values - ST STM32F101 Series Reference Manual

RM0008
5.5

GPIO and AFIO register maps

Refer to
5.5.1

GPIO register map

Table 25. GPIO register map and reset values
Offset Register
CNF
GPIOx_CRL
00h
[1:0]
Reset value 0
CNF
GPIOx_CRH
04h
[1:0]
Reset value 0
GPIOx_IDR
08h
Reset value
GPIOx_ODR
0Ch
Reset value
GPIOx_BSRR
10h
Reset value 0
GPIOx_BRR
14h
Reset value
GPIOx_LCKR
18h
Reset value
5.5.2

AFIO register map

Table 26. AFIO register map and reset values
Offset Register
AFIO_EVCR
00h
Reset value
AFIO_MAPR
04h
Reset value
AFIO_EXTICR1
08h
Reset value
AFIO_EXTICR2
0Ch
Reset value
AFIO_EXTICR3
10h
Reset value
AFIO_EXTICR4
14h
Reset value
General-purpose and alternate-function I/Os (GPIOs and AFIOs)
Table 1 on page 27 for the register boundary addresses.
MODE CNF MODE CNF
7 7 6 6
[1:0] [1:0] [1:0] [1:0]
1 0 0 0 1 0 0 0
MODE CNF MODE CNF
15 15 14 14
[1:0] [1:0] [1:0] [1:0]
1 0 0 0 1 0 0 0
Reserved
Reserved
BR[15:0]
0 0 0 0 0 0 0 0
Reserved
Reserved
Reserved
0 0 0
Reserved
Reserved
Reserved
Reserved
MODE CNF MODE CNF
5 5 4 4
[1:0] [1:0] [1:0] [1:0]
1 0 0 0 1 0 0 0
MODE CNF MODE CNF
13 13 12 12 11
[1:0] [1:0] [1:0] [1:0]
1 0 0 0 1 0 0 0
0
0
0 0 0 0 0 0 0 0
0
0 0
Reserved
Reserved
0
EXTI3[3:0]
0
EXTI7[3:0]
0
EXTI11[3:0]
0
EXTI15[3:0]
0
MODE CNF MODE CNF
3 3 2 2 1
[1:0] [1:0] [1:0] [1:0]
1 0 0 0 1 0 0 0
MODE CNF MODE CNF
11 10 10 9
[1:0] [1:0] [1:0] [1:0]
1 0 0 0 1 0 0 0
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
EXTI2[3:0] EXTI1[3:0]
0 0 0 0 0 0 0 0
EXTI6[3:0] EXTI5[3:0]
0 0 0 0 0 0 0 0
EXTI10[3:0] EXTI9[3:0]
0 0 0 0 0 0 0 0
EXTI14[3:0] EXTI13[3:0]
0 0 0 0 0 0 0 0
MODE CNF MODE
1 0 0
[1:0] [1:0] [1:0]
1 0 0 0 1 0 0
MODE CNF MODE
9 8 8
[1:0] [1:0] [1:0]
1 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 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
EXTI0[3:0]
0 0 0 0 0 0 0
EXTI4[3:0]
0 0 0 0 0 0 0
EXTI8[3:0]
0 0 0 0 0 0 0
EXTI12[3:0]
0 0 0 0 0 0 0
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