M16C65 Datasheet, PDF (454/829 Pages) Renesas Technology Corp – RENESAS MCU M16C FAMILY / M16C/60

Under development
M16C/65 Group
Preliminary Specification
This is a preliminary specification and is subject to change.
20. Real-Time Clock
Time and day change
TSTART bit
in RTCCR1 register = 0
TCSTF bit in
RTCCR1 register = 0?
0
RTCTIC register ← 00h
RTCCIC register ← 00h
Stop real-time clock operation
(not necessary while count is stop)
1
Disable real-time clock periodic interrupt
Disable real-time clock compare interrupt
Setting of RTCCSR register
Select clock source
Setting of H12H24 bit
in RTCCR1 register
Setting of registers RTCSEC,
RTCMIN, RTCHR,and RTCWK
Setting of RTCPM bit
in RTCCR1 register
Setting of RTCCR2 register
Setting of registeres RTCTIC and RTCCIC
(IR bit ← 0, select interrupt priority level)
Set a.m./p.m. operating mode
Set second, minute, hour, day
Set a.m./p.m.
Select interrupt source
TSTART bit
in RTCCR1 register = 1
Start real-time clock operation
TCSTF bit in
0
RTCCR1 register = 1?
1
End
Figure 20.4 Time and Day Change Procedure (No Compare Mode or Compare 1 Mode)
REJ09B0484-0030 Rev.0.30 Sep 09, 2008
Page 419 of 791