Datasheet

 2017 Microchip Technology Inc. DS60001516A-page 95

SAM9G20

14.4.1 Real-time Timer Mode Register

Name:RTT_MR

Access: Read/Write

RTPRES: Real-time Timer Prescaler Value

Defines the number of SLCK periods required to increment the Real-time timer. RTPRES is defined as follows:

RTPRES = 0: The prescaler period is equal to 2

RTPRES ≠ 0: The prescaler period is equal to RTPRES.

ALMIEN: Alarm Interrupt Enable

0: The bit ALMS in RTT_SR has no effect on interrupt.

1: The bit ALMS in RTT_SR asserts interrupt.

RTTINCIEN: Real-time Timer Increment Interrupt Enable

0: The bit RTTINC in RTT_SR has no effect on interrupt.

1: The bit RTTINC in RTT_SR asserts interrupt.

RTTRST: Real-time Timer Restart

1: Reloads and restarts the clock divider with the new programmed value. This also resets the 32-bit counter.

31 30 29 28 27 26 25 24

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23 22 21 20 19 18 17 16

–––––RTTRSTRTTINCIENALMIEN

15 14 13 12 11 10 9 8

RTPRES

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RTPRES