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1745D–ATARM–04-Nov-05
AT91M55800A
Figure 16-1. Parallel I/O Multiplexed with a Bi-directional Signal
Note: 1. See “Section 16.8 ”PIO Connection Tables” .”
Pad
PIO_OSR
1
0
1
0
PIO_PSR
PIO_ODSR
1
0
Filter
0
1
PIO_IFSR
PIO_PSR
Event
Detection
PIO_PDSR
PIO_ISR
PIO_IMR
0
1
PIO_MDSR
Peripheral
Output
Enable
Peripheral
Output
Peripheral
Input
PIOIRQ
Pad Output Enable
Pad Output
Pad Input
OFF
Value
(1)