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1745D–ATARM–04-Nov-05
AT91M55800A
16.9.19 PIO Multi-driver Disable Register
Register Name: PIO_MDDR
Access Type: Write-only
Offset:
0x54
This register is used to disable the open drain configuration of the output buffer.
1 = Disables the multi-driver option on the corresponding pin.
0 = No effect.
16.9.20 PIO Multi-driver Status Register
Register Name: PIO_MDSR
Access Type: Read-only
Reset Value: 0x0
Offset:
0x58
This register indicates which pins are configured with open drain drivers.
1 = PIO is configured as an open drain.
0 = PIO is not configured as an open drain.
31 30 29 28 27 26 25 24
P31 P30 P29 P28 P27 P26 P25 P24
23 22 21 20 19 18 17 16
P23 P22 P21 P20 P19 P18 P17 P16
15 14 13 12 11 10 9 8
P15 P14 P13 P12 P11 P10 P9 P8
76543210
P7 P6 P5 P4 P3 P2 P1 P0
31 30 29 28 27 26 25 24
P31 P30 P29 P28 P27 P26 P25 P24
23 22 21 20 19 18 17 16
P23 P22 P21 P20 P19 P18 P17 P16
15 14 13 12 11 10 9 8
P15 P14 P13 P12 P11 P10 P9 P8
76543210
P7 P6 P5 P4 P3 P2 P1 P0