Datasheet

V850ES/JG3-H, V850ES/JH3-H CHAPTER 12 REAL-TIME COUNTER
R01UH0042EJ0500 Rev.5.00 Page 641 of 1513
Aug 12, 2011
RTCE
Stops counter operation.
Enables counter operation.
RCTE
0
1
Control of operation of each counter
RC1CC1 0 CLOE1 CLOE0 AMPM
CT2
CT1 CT0
654321
Disables RTC1HZ pin output (1 Hz)
Enables RTC1HZ pin output (1 Hz)
CLOE1
0
1
RTC1HZ pin output control
Disables RTCCL pin output (32.768 kHz)
Enables RTCCL pin output (32.768 kHz)
CLOE0
0
1
RTCCL pin output control
12-hour system (a.m. and p.m. are displayed.)
24-hour system
AMPM
0
1
12-hour system/24-hour system selection
07
After reset: 00H R/W Address: FFFFFADEH
Does not use fixed-cycle interrupts
Once in 0.5 second (synchronous with second count-up)
Once in 1 second (simultaneous with second count-up)
Once in 1 minute (every minute at 00 seconds)
Once in 1 hour (every hour at 00 minutes 00 seconds)
Once in 1 day (every day at 00 hours 00 minutes 00 seconds)
Once in 1 month (one day every month at 00 hours
00 minutes 00 seconds a.m.)
CT2
0
0
0
0
1
1
1
Fixed-cycle interrupt (INTRTC0) selection
CT1
0
0
1
1
0
0
1
CT0
0
1
0
1
0
1
×
Cautions 1. Writing 0 to the RTCE bit while the RTCE bit is 1 is prohibited. Clear the RTCE bit by
clearing the RC1PWR bit according to 12.4.8 Initializing real-time counter.
2. The RTC1HZ output operates as follows when the CLOE1 bit setting is changed.
• When changed from 0 to 1: The RTC1HZ output outputs a 1 Hz pulse after two clocks
(2 x 32.768 kHz) or less.
• When changed from 1 to 0: The RTC1HZ output is stopped (fixed to low level) after
two clocks (2 x 32.768 kHz) or less.
3. See 12.4.1 Initial settings and 12.4.2 Rewriting each counter during the real-time counter
operation for setting or changing the AMPM bit. Furthermore, re-set the RC1HOUR
register when the AMPM bit is rewritten.
4. See 12.4.4 Changing INTRTC0 interrupt setting during the real-time counter operation
when rewriting the CT2 to CT0 bits while the real-time counter operates (RC1PWR bit =
1).