Gpio Port Output Speed Register (Gpiox_Ospeedr); (X = A; Gpio Port Pull-Up/Pull-Down Register (Gpiox_Pupdr) - STMicroelectronics STM32F05 series Reference Manual

General-purpose I/Os (GPIO)
8.4.3

GPIO port output speed register (GPIOx_OSPEEDR)

(x = A..D, F)
Address offset: 0x08
Reset value: 0x0000 0000
31 30 29
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
OSPEEDR7[1:0] OSPEEDR6[1:0] OSPEEDR5[1:0] OSPEEDR4[1:0]
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Bits 2y+1:2y OSPEEDRy[1:0]: Port x configuration bits (y = 0..15)
8.4.4

GPIO port pull-up/pull-down register (GPIOx_PUPDR)

(x = A..D, F)
Address offset: 0x0C
Reset values:
● 0x2400 0000 for port A
●
0x0000 0000 for other ports
31 30 29 28
PUPDR15[1:0] PUPDR14[1:0]
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15 14 13 12
PUPDR7[1:0] PUPDR6[1:0]
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Bits 2y+1:2y PUPDRy[1:0]: Port x configuration bits (y = 0..15)
128/742
28 27 26 25
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12 11 10 9
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These bits are written by software to configure the I/O output speed.
x0: 2 MHz Low speed
01: 10 MHz Medium speed
11: 50 MHz High speed
Note: Refer to the device datasheet for the frequency specifications and the power
supply and load conditions for each speed.
27 26 25
PUPDR13[1:0] PUPDR12[1:0]
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11 10 9
PUPDR5[1:0] PUPDR4[1:0]
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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
Doc ID 018940 Rev 1
24 23 22
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8 7 6
OSPEEDR3[1:0] OSPEEDR2[1:0] OSPEEDR1[1:0] OSPEEDR0[1:0]
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24 23 22 21
PUPDR11[1:0] PUPDR10[1:0]
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8 7 6 5
PUPDR3[1:0] PUPDR2[1:0]
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21 20 19 18
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5 4 3 2
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20 19 18
PUPDR9[1:0]
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4 3 2
PUPDR1[1:0]
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RM0091
17 16
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1 0
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17 16
PUPDR8[1:0]
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1 0
PUPDR0[1:0]
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