Datasheet

Table Of Contents
160
SAM9N12/SAM9CN11/SAM9CN12 [DATASHEET]
11063K–ATARM–05-Nov-13
18.7.2 Shutdown Mode Register
Name: SHDW_MR
Address: 0xFFFFFE14
Access: Read/Write
WKMODE0: Wake-up Mode 0
CPTWK0: Debounce Counter on Wake-up 0
Defines the minimum duration of the WKUP1 pin after the occurence of the selected triggering edge (WKMODE0).
The SHDN pin is released if the WKUP0 holds the selected level for (CPTWK * 16 + 1) consecutive Slow Clock cycles after the
occurence of the selected triggering edge on WKUP0.
RTCWKEN: Real-time Clock Wake-up Enable
0: The RTC Alarm signal has no effect on the Shutdown Controller.
1: The RTC Alarm signal forces the de-assertion of the SHDN pin.
31 30 29 28 27 26 25 24
––––––––
23 22 21 20 19 18 17 16
––––––RTCWKEN
15 14 13 12 11 10 9 8
––––––––
76543210
CPTWK0 WKMODE0
Value Name Description
0 NO_DETECTION No detection is performed on the wake-up input
1 RISING_EDGE Low to high transition triggers the detection process
2 FALLING_EDGE High to low level transition triggers the detection process
3 ANY_EDGE Any edge on the wake-up input triggers the detection process