RM0453 Rev 1 403/1461
RM0453 General-purpose I/Os (GPIO)
427
10.4.2 GPIOx output type register (GPIOx_OTYPER) (x = A to B)
Address offset: Block A: 0x0004
Address offset: Block B: 0x0404
Reset value: 0x0000 0000
10.4.3 GPIOx output speed register (GPIOx_OSPEEDR) (x = A to B)
Address offset: Block A: 0x0008
Address offset: Block B: 0x0408
Reset value: Block A: 0x0C00 0000
Reset value: Block B: 0x0000 00C0
Bits 9:8 MODE4[1:0]: Port Px4 IO type configuration
Bits 7:6 MODE3[1:0]: Port Px3 IO type configuration
Bits 5:4 MODE2[1:0]: Port Px2 IO type configuration
Bits 3:2 MODE1[1:0]: Port Px1 IO type configuration
Bits 1:0 MODE0[1:0]: Port Px0 IO type configuration
These bits are written by software to configure the I/O mode.
00: Input mode
01: General purpose output mode
10: Alternate function mode
11: Analog mode (reset state)
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
OT15 OT14 OT13 OT12 OT11 OT10 OT9 OT8 OT7 OT6 OT5 OT4 OT3 OT2 OT1 OT0
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Bits 31:16 Reserved, must be kept at reset value.
Bits 15:0 OT[15:0]: Port Px[15:0] output type configuration
These bits are written by software to configure the I/O output type.
0: Output push-pull (reset state)
1: Output open-drain
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
OSPEED15[1:0] OSPEED14[1:0] OSPEED13[1:0] OSPEED12[1:0] OSPEED11[1:0] OSPEED10[1:0] OSPEED9[1:0] OSPEED8[1:0]
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15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
OSPEED7[1:0] OSPEED6[1:0] OSPEED5[1:0] OSPEED4[1:0] OSPEED3[1:0] OSPEED2[1:0] OSPEED1[1:0] OSPEED0[1:0]
rw rw rw rw rw rw rw rw rw rw rw rw rw rw rw rw
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