Real Time Clock Interrupt - Fujitsu F2MC-8FX Hardware Manual

CHAPTER 27 REAL TIME CLOCK
27.4

Real Time Clock Interrupt

The real time clock features alarm interrupt - minute, hour, day, month and auto-
calibration.
Interrupt Function
RTCCRH:MS will be activate when RTCCRH:MC is "1" and minute register matches minute counter.
Similarly, RTCCRH:HS will be activated when DTCCRH:HC is "1" and hour compare register matches
hour counter. RTCCRH:DS will be activated when RTCCRH:DC is "1" and day compare register matches
day counter. RTCCRH:MOS will be activated when RTCCRH:MOC is "1" and month compare register
matches month counter. Apart from the enable bits and the matching(s), the generation of alarm interrupt
request also depends on the RTCCRL:INTS. Besides, the interrupt also can be generated by the
completion, underflow or overflow of auto-calibraion.
Register and vector table for the real time clock interrupt
Table 27.4-1 Register and Vector Table for Interrupts of real time clock
Interrupt
source
Alarm(MS, HS,
DS, MOS,
CALCP,
CALUF &
CALOF)
512
Interrupt level setup register
Interrupt
request No.
Register
IRQ11 ILR2
Vector table address
Setting bit Upper
FFE4
L11
H
Lower
FFE5
H