General-purpose I/Os (GPIO) RM0440
362/2126 RM0440 Rev 4
9.4.5 GPIO port input data register (GPIOx_IDR)
(x = A to G)
Address offset: 0x10
Reset value: 0x0000 XXXX
9.4.6 GPIO port output data register (GPIOx_ODR)
(x = A to G)
Address offset: 0x14
Reset value: 0x0000 0000
9.4.7 GPIO port bit set/reset register (GPIOx_BSRR)
(x = A to G)
Address offset: 0x18
Bits 31:0 PUPD[15:0][1:0]: Port x configuration I/O pin y (y = 15 to 0)
These bits are written by software to configure the I/O pull-up or pull-down
00: No pull-up, pull-down
01: Pull-up
10: Pull-down
11: Reserved
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
Res. Res. Res. Res. Res. Res. Res. Res. Res. Res. Res. Res. Res. Res. Res. Res.
1514131211109876543210
ID15 ID14 ID13 ID12 ID11 ID10 ID9 ID8 ID7 ID6 ID5 ID4 ID3 ID2 ID1 ID0
rrrrrr r r r r rrrrrr
Bits 31:16 Reserved, must be kept at reset value.
Bits 15:0 ID[15:0]: Port x input data I/O pin y (y = 15 to 0)
These bits are read-only. They contain the input value of the corresponding I/O port.
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
Res. Res. Res. Res. Res. Res. Res. Res. Res. Res. Res. Res. Res. Res. Res. Res.
1514131211109876543210
OD15 OD14 OD13 OD12 OD11 OD10 OD9 OD8 OD7 OD6 OD5 OD4 OD3 OD2 OD1 OD0
rw rw rw rw rw rw rw rw rw rw rw rw rw rw rw rw
Bits 31:16 Reserved, must be kept at reset value.
Bits 15:0 OD[15:0]: Port output data I/O pin y (y = 15 to 0)
These bits can be read and written by software.
Note: For atomic bit set/reset, the OD bits can be individually set and/or reset by writing to the
GPIOx_BSRR register (x = A..F).
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