104
6174B–ATARM–07-Nov-05
AT91FR40162S Preliminary
14.6.17
PIO Interrupt Status Register
Register Name:
PIO_ISR
Access Type:
Read-only
Reset Value:
0
Offset:
0x4C
This register indicates for each pin when a logic value change has been detected (rising or falling edge). This is valid
whether the PIO is selected for the pin or not and whether the pin is an input or output.
The register is reset to zero following a read, and at reset.
1 = At least one change has been detected on the corresponding pin since the register was last read.
0 = No change has been detected on the corresponding pin since the register was last read.
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
7
6
5
4
3
2
1
0
P7
P6
P5
P4
P3
P2
P1
P0