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General-purpose I/Os (GPIO)
Offset
Register
GPIOB_PUPDR
0x0C
Reset value
GPIOx_IDR
(where x = A..F)
0x10
Reset value
GPIOx_ODR
(where x = A..F)
0x14
Reset value
GPIOx_BSRR
(where x = A..F)
0x18
Reset value
GPIOx_LCKR
(1)
(where x = see
)
0x1C
Reset value
GPIOx_AFRL
(where x = A..F)
0x20
Reset value
GPIOx_AFRH
(where x = A..F)
0x24
Reset value
1. A, B and D in STM32F302xB/C, A, B, C, D and F in STM32F302x6/8.
Refer to
171/1080
Table 31. GPIO register map and reset values (continued)
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
AFRLAFR7[3:
AFRLAFR6[3:
AFRLAFR5[3:
0]
0]
0
0
0
0
0
0
0
0
AFRHAFR15[
AFRHAFR14[
AFRHAFR13[
3:0]
3:0]
0
0
0
0
0
0
0
0
Section 3.2.2 on page 47
0
0
0
0
0
0
0
0
0
x
0
0
0
0
0
0
0
0
0
0
0
0
AFRLAFR4[3:
AFRLAFR3[3
0]
0]
0
0
0
0
0
0
0
0
0
AFRHAFR12[
AFRHAFR11[
3:0]
3:0]
0
0
0
0
0
0
0
0
0
for the register boundary addresses.
DocID025202 Rev 7
0
0
0
0
0
0
1
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
0
0
0
0
0
0
0
0
0
AFRLAFR2[3:
AFRLAFR1[3
:0]
0]
0
0
0
0
0
0
0
0
0
AFRHAFR10[
AFRHAFR9[3
3:0]
3:0]
0
0
0
0
0
0
0
0
0
RM0365
0
0
0
0
0
0
x
x
x
x
x
x
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
AFRLAFR0[3
:0]
:0]
0
0
0
0
0
0
AFRHAFR8[3
:0]
:0]
0
0
0
0
0
0
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