SAMD20G_14 Datasheet, PDF (203/676 Pages) ATMEL Corporation – SMART ARM-Based Microcontroller

Figure 18-2. RTC Block Diagram (Mode 1 — 16-Bit Counter)
0
GCLK_RTC
10-bit
CLK_RTC_CNT
Prescaler
Periodic
Events
COUNT
=
16
16
PER
=
16
COMPn
Overflow
Compare n
Figure 18-3. RTC Block Diagram (Mode 2 — Clock/Calendar)
0
MATCHCLR
GCLK_RTC
10-bit ^CLK_RTC_CNT
Prescaler
Periodic
Events
MASKn
CLOCK
32
Y/M/D H:M:S
=
32
Y/M/D H:M:S
ALARMn
Overflow
Alarm n
18.4 Signal Description
Not applicable.
18.5 Product Dependencies
In order to use this peripheral, other parts of the system must be configured correctly, as described below.
18.5.1 I/O Lines
Not applicable.
18.5.2 Power Management
The RTC can continue to operate in any sleep mode. The RTC interrupts can be used to wake up the device from sleep
modes. The events can trigger other operations in the system without exiting sleep modes. Refer to “PM – Power
Manager” on page 107 for details on the different sleep modes.
The RTC will be reset only at power-on (POR) or by writing a one to the Software Reset bit in the Control register
(CTRL.SWRST).
Atmel | SMART SAM D20 [DATASHEET]
Atmel-42129L–SAM-D20_datasheet–09/2014
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