Datasheet

Figure 21-7. Edge Detection with Asynchronous Stability Debouncing
CLK_RTC
CLK_RTC_DEB
IN
OUT
Once a new edge is detected, ignore subsequent edges
until input is stable for 4 consecutive CLK_RTC_DEB
NE
NE
PE
TAMLVL=0
CLK_RTC
CLK_RTC_DEB
IN
OUT
Once a new edge is detected, ignore subsequent edges
until input is stable for 4 consecutive CLK_RTC_DEB
NENE
PE
TAMLVL=1
PE
NE
PE
PE
NE
PE
Figure 21-8. Edge Detection with Majority Debouncing
1
0
0
1
1
0
1
1
1
1
1
1
0
1
1
1
0
1
1
1
0
CLK_RTC
CLK_RTC_DEB
IN
IN shift 0
IN shift 1
IN shift 2
MAJORITY3
OUT
CLK_RTC
CLK_RTC_DEB
IN
IN shift 0
IN shift 1
IN shift 2
MAJORITY3
OUT
1
1
1
0
1
1
1
0
1
0
1
0
0
0
1
0
0
0
0
0
0
0
0
0
11 1 0 0 0
TAMLVL=1
TAMLVL=0
0-to-1 transition
1-to-0 transition
NENE
PEPE
NE
PE
0 0 0 11 1 11 1
1
0
0
1
1
0
1
1
1
1
1
1
0
1
1
1
0
1
1
1
0
1
1
1
0
1
1
1
0
1
0
1
0
0
0
1
0
0
0
0
0
0
0
0
0
11 1 0 0 0
NENE
PEPE
NE
PE
0 0 0 11 1 11 1
SAM D5x/E5x Family Data Sheet
RTC – Real-Time Counter
© 2019 Microchip Technology Inc.
Datasheet
DS60001507E-page 296