Pedr bit definitions -28 – Intel PXA255 User Manual
Page 90
3-28
Intel® PXA255 Processor Developer’s Manual
Clocks and Power Manager
3.5.6
Power Manager GPIO Edge Detect Status Register (PEDR)
The PEDR,
, indicates which of the GPIO pins enabled through the PWER, PRER, and
PFER registers caused a wake up from sleep mode. The bits in PEDR can only be set on a rising or
falling edge on a given GPIO pin. If PRER is set, the bits in PEDR can only be set on a rising edge.
If PFER is set, the bits in PEDR can only be set on a falling edge. To reset a bit in PEDR to zero,
write a 1 to it. The PEDR bits are reset to zero in hardware, watchdog, and GPIO resets.
This is a read/write register. Ignore reads from reserved bits. Write zeros to reserved bits.
Table 3-12. PEDR Bit Definitions
0x40F0_0018
PEDR
Clocks and Power Manager
Bit
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Re
se
rv
e
d
ED
1
5
ED
1
4
ED
1
3
ED
1
2
ED
11
ED
1
0
ED
9
ED
8
ED
7
ED
6
ED
5
ED
4
ED
3
ED
2
ED
1
ED
0
Reset
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Bits
Name
Description
[31:16]
—
Reserved.
Read undefined and must always be written with zeroes.
[15:0]
EDx
Sleep mode Edge Detect Status
0 – Wake up on GPx not detected.
1 – Wake up due to edge on GPx detected.
Cleared by hardware, watchdog, and GPIO resets. Cleared by writing a 1.