Interrupts - Renesas M16C/64C User Manual

M16C/64C Group
20.4

Interrupts

The real-time clock generates two types of interrupt:
•
Periodic interrupts triggered every second, minute, hour, day, and week
•
Compare match interrupt
See Table 20.4 Periodic Interrupt Sources for details on periodic interrupt sources, individual mode
specifications and an operating example for the interrupt request generating timing. Refer to 14.7
"Interrupt Control" for details of interrupt control. Table 20.5 lists Real-Time Clock Interrupt-Associated
Registers.
Table 20.5 Real-Time Clock Interrupt-Associated Registers
Address
006Eh Real-Time Clock Periodic Interrupt Control Register
006Fh Real-Time Clock Compare Interrupt Control Register
0205h Interrupt Source Select Register 3
The real-time clock shares interrupt vectors and interrupt control registers with other peripheral functions.
To use period interrupts, set the IFSR35 bit in the IFSR3A register to 1 (real-time clock cycle). To use
compare interrupts, set the IFSR36 bit in the IFSR3A register to 1 (real-time clock compare).
R01UH0092EJ0110 Rev.1.10
Jul 31, 2012
Register
20. Real-Time Clock
Symbol Reset Value
RTCTIC XXXX X000b
RTCCIC XXXX X000b
IFSR3A 00h
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