Gpio Port Output Speed Register (Gpiox_Ospeedr); (X = A; Gpio Port Pull-Up/Pull-Down Register (Gpiox_Pupdr) - ST STM32F412 Reference Manual

General-purpose I/Os (GPIO)
7.4.3

GPIO port output speed register (GPIOx_OSPEEDR)

(x = A...H)
Address offset: 0x08
Reset values:
•
0x0C00 0000 for port A
• 0x0000 00C0 for port B
•
0x0000 0000 for other ports
31 30 29
OSPEEDR15 OSPEEDR14
[1:0] [1:0]
rw rw rw
15 14 13
OSPEEDR7[1:0] OSPEEDR6[1:0] OSPEEDR5[1:0] OSPEEDR4[1:0]
rw rw rw
Bits 2y:2y+1 OSPEEDRy[1:0]: Port x configuration bits (y = 0..15)
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)
180/1163
28 27 26 25
OSPEEDR13 OSPEEDR12
[1:0]
rw rw rw rw
12 11 10 9
rw rw rw rw
These bits are written by software to configure the I/O output speed.
00: Low speed
01: Medium speed
10: Fast speed
11: High speed
Note: Refer to the product datasheets for the values of OSPEEDRy bits versus V
range and external load.
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
24 23 22
OSPEEDR11
[1:0] [1:0]
rw rw rw
8 7 6
OSPEEDR3[1:0]
rw rw rw
24 23 22
PUPDR11[1:0]
rw rw rw
8 7 6
PUPDR3[1:0]
rw rw rw
RM0402 Rev 6
21 20 19
OSPEEDR10 OSPEEDR9
[1:0] [1:0]
rw rw rw
5 4 3
OSPEEDR1
OSPEEDR2[1:0]
[1:0]
rw rw rw
21 20 19 18
PUPDR10[1:0] PUPDR9[1:0]
rw rw rw rw
5 4 3 2
PUPDR2[1:0] PUPDR1[1:0]
rw rw rw rw
RM0402
18 17 16
OSPEEDR8
[1:0]
rw rw rw
2 1 0
OSPEEDR0
1:0]
rw rw rw
DD
17 16
PUPDR8[1:0]
rw rw
1 0
PUPDR0[1:0]
rw rw