Gpio Port Pull-Up/Pull-Down Register (Gpiox_Pupdr) (X = A..h; Gpio Port Input Data Register (Gpiox_Idr) (X = A..h - ST STM32F446 Series Reference Manual

RM0390
7.4.4

GPIO port pull-up/pull-down register (GPIOx_PUPDR) (x = A..H)

Address offset: 0x0C
Reset values:
• 0x6400 0000 for port A
•
0x0000 0100 for port B
• 0x0000 0000 for other ports
31 30 29 28
PUPDR15[1:0] PUPDR14[1:0]
rw rw rw rw
15 14 13 12
PUPDR7[1:0] PUPDR6[1:0]
rw rw rw rw
Bits 2y:2y+1 PUPDRy[1:0]: Port x configuration bits (y = 0..15)
7.4.5

GPIO port input data register (GPIOx_IDR) (x = A..H)

Address offset: 0x10
Reset value: 0x0000 XXXX (where X means undefined)
31 30 29 28
Res. Res. Res. Res.
15 14 13 12
IDR15 IDR14 IDR13 IDR12
r r r
Bits 31:16 Reserved, must be kept at reset value.
Bits 15:0 IDRy: Port input data (y = 0..15)
27 26 25
PUPDR13[1:0] PUPDR12[1:0]
rw rw rw
11 10 9
PUPDR5[1:0] PUPDR4[1:0]
rw rw rw
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
27 26 25
Res. Res. Res.
11 10 9
IDR11 IDR10 IDR9
r r r r
These bits are read-only and can be accessed in word mode only. They contain the input
value of the corresponding I/O port.
24 23 22
PUPDR11[1:0] PUPDR10[1:0]
rw rw rw
8 7 6
PUPDR3[1:0] PUPDR2[1:0]
rw rw rw
24 23 22
Res. Res. Res. Res.
8 7 6
IDR8 IDR7 IDR6 IDR5
r r r
RM0390 Rev 4
General-purpose I/Os (GPIO)
21 20 19 18
PUPDR9[1:0]
rw rw rw rw
5 4 3 2
PUPDR1[1:0]
rw rw rw rw
21 20 19 18
Res. Res. Res.
5 4 3 2
IDR4 IDR3 IDR2
r r r r
17 16
PUPDR8[1:0]
rw rw
1 0
PUPDR0[1:0]
rw rw
17 16
Res. Res.
1 0
IDR1 IDR0
r r
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