Datasheet

Section 10 Realtime Clock (RTC)
Rev. 2.00 Jul. 04, 2007 Page 219 of 692
REJ09B0309-0200
10.3.6 RTC Control Register 2 (RTCCR2)
RTCCR2 controls RTC periodic interrupts of week, day, hour, minute, one second, 0.5 seconds,
and 0.25 seconds. Enabling interrupts of week, day, hour, minute, one second, 0.5 seconds, and
0.25 seconds sets the corresponding flag to 1 in the RTC interrupt flag register (RTCFLG) when
an interrupt occurs. It also controls an overflow interrupt of a free running counter when RTC
operates as a free running counter.
Bit Bit Name
Initial
Value
R/W Description
7 FOIE —/(0)* R/W Free Running Counter Overflow Interrupt Enable
0: Disables an overflow interrupt
1: Enables an overflow interrupt
6 WKIE —/(0)* R/W Week Periodic Interrupt Enable
0: Disables a week periodic interrupt
1: Enables a week periodic interrupt
5 DYIE —/(0)* R/W Day Periodic Interrupt Enable
0: Disables a day periodic interrupt
1: Enables a day periodic interrupt
4 HRIE —/(0)* R/W Hour Periodic Interrupt Enable
0: Disables an hour periodic interrupt
1: Enables an hour periodic interrupt
3 MNIE —/(0)* R/W Minute Periodic Interrupt Enable
0: Disables a minute periodic interrupt
1: Enables a minute periodic interrupt
2 1SEIE —/(0)* R/W One-Second Periodic Interrupt Enable
0: Disables a one-second periodic interrupt
1: Enables a one-second periodic interrupt
1 05SEIE —/(0)* R/W 0.5-Second Periodic Interrupt Enable
0: Disables a 0.5-second periodic interrupt
1: Enables a 0.5-second periodic interrupt
0 025SEIE —/(0)* R/W 0.25-Second Periodic Interrupt Enable
0: Disables a 0.25-second periodic interrupt
1: Enables a 0.25-second periodic interrupt
Note: * This is the initial value after a reset by the RST bit in RTCCR1.