Datasheet

19.3 Block Diagram
Figure 19-1. RTC Block Diagram (Mode 0 — 32-Bit Counter)
COUNT
COMPn
= Compare n
Overflow
0
MATCHCLR
10-bit
Prescaler
GCLK_RTC
CLK_RTC_CNT
32
Periodic
Events
32
Figure 19-2. RTC Block Diagram (Mode 1 — 16-Bit Counter)
10-bit
Prescaler
GCLK_RTC
COUNT
PER
Overflow
0
COMPn
Compare n
CLK_RTC_CNT
16
Periodic
Events
16
16
=
=
Figure 19-3. RTC Block Diagram (Mode 2 — Clock/Calendar)
CLOCK
ALARMn
=
Alarm n
Overflow
0
MATCHCLR
10-bit
Prescaler
GCLK_RTC CLK_RTC_CNT
32
Periodic
Events
32
MASKn
Y/M/D H:M:S
Y/M/D H:M:S
19.4 Signal Description
Not applicable.
19.5 Product Dependencies
In order to use this peripheral, other parts of the system must be configured correctly, as described below.
SAM D21 Family
RTC – Real-Time Counter
© 2018 Microchip Technology Inc.
Datasheet Complete
DS40001882D-page 257