Gpio And Afio Register Maps; Table 59. Gpio Register Map And Reset Values; Table 60. Afio Register Map And Reset Values - ST STM32F101 series Reference Manual

RM0008
9.5

GPIO and AFIO register maps

Refer to
the GPIO and AFIO register map and the reset values.
Offset Register
CN
GPIOx_CRL F7
0x00
[1:0]
Reset value 0 1
CN
F
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
Offset Register
AFIO_EVCR
0x00
Reset value
AFIO_MAPR
low-, medium-,
high- and XL-
0x04
density devices
Reset value
General-purpose and alternate-function I/Os (GPIOs and AFIOs)
Table 3 on page 51 for the register boundary addresses. The following tables give

Table 59. GPIO register map and reset values

MODE CN MODE CN
7 F6 6 F5
[1:0] [1:0] [1:0] [1:0]
0 0 0 1 0 0 0 1
CN CN
MODE MODE
F F
15 14
14 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

Table 60. AFIO register map and reset values

Reserve
Reserved
0 0 0
MODE CNF MODE CN
5 4 4 F3
[1:0] [1:0] [1:0] [1:0]
0 0 0 1 0 0 0 1
CN
MODE CNF MODE
F
13 12 12
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
d
0 0 0 0 0 0
DocID13902 Rev 15
MODE CNF MODE CN
3 2 2 F1
[1:0] [1:0] [1:0] [1:0]
0 0 0 1 0 0 0 1
CN
MODE CNF MODE
F
11 10 10
9
[1:0] [1:0] [1:0]
[1:0]
0 0 0 1 0 0 0 1
IDRy
0 0 0 0 0 0 0 0
ODRy
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
MOD CNF MOD
E1 0 E0
[1:0] [1:0] [1:0]
0 0 0 1 0 0
MOD CNF MOD
E9 8 E8
[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:
PIN[3:0]
0]
0 0 0 0 0 0
0 0 0 0 0 0
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195