ST STM32F405

General-purpose I/Os (GPIO) RM0090
282/1749 RM0090 Rev 18
8.4.3 GPIO port output speed register (GPIOx_OSPEEDR)
(x = A..I/J/K)
Address offset: 0x08
Reset values:
• 0x0C00 0000 for port A
• 0x0000 00C0 for port B
• 0x0000 0000 for other ports
8.4.4 GPIO port pull-up/pull-down register (GPIOx_PUPDR)
(x = A..I/J/K)
Address offset: 0x0C
Reset values:
• 0x6400 0000 for port A
• 0x0000 0100 for port B
• 0x0000 0000 for other ports
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
OSPEEDR15
[1:0]
OSPEEDR14
[1:0]
OSPEEDR13
[1:0]
OSPEEDR12
[1:0]
OSPEEDR11
[1:0]
OSPEEDR10
[1:0]
OSPEEDR9
[1:0]
OSPEEDR8
[1:0]
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15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
OSPEEDR7[1:0] OSPEEDR6[1:0] OSPEEDR5[1:0] OSPEEDR4[1:0] OSPEEDR3[1:0] OSPEEDR2[1:0]
OSPEEDR1
[1:0]
OSPEEDR0
1:0]
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Bits 2y:2y+1 OSPEEDRy[1:0]: Port x configuration bits (y = 0..15)
These bits are written by software to configure the I/O output speed.
00: Low speed
01: Medium speed
10: High speed
11: Very high speed
Note: Refer to the product datasheets for the values of OSPEEDRy bits versus V
DD
range and external load.
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
PUPDR15[1:0] PUPDR14[1:0] PUPDR13[1:0] PUPDR12[1:0] PUPDR11[1:0] PUPDR10[1:0] PUPDR9[1:0] PUPDR8[1:0]
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1514131211109876543210
PUPDR7[1:0] PUPDR6[1:0] PUPDR5[1:0] PUPDR4[1:0] PUPDR3[1:0] PUPDR2[1:0] PUPDR1[1:0] PUPDR0[1:0]
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