RL78/G1H CHAPTER 9 REAL-TIME CLOCK
R01UH0575EJ0120 Rev. 1.20 Page 248 of 920
Dec 22, 2016
9.3.9 Week count register (WEEK)
The WEEK register is an 8-bit register that takes a value of 0 to 6 (decimal) and indicates the count value of
weekdays.
It counts up in synchronization with the day counter.
When data is written to this register, it is written to a buffer and then to the counter up to two cycles of f
RTC later.
Set a decimal value of 00 to 06 to this register in BCD code.
The WEEK register can be set by an 8-bit memory manipulation instruction.
Reset signal generation clears this register to 00H.
Figure 9 - 11 Format of Week count register (WEEK)
Caution 1. The value corresponding to the month count register (MONTH) or the day count register (DAY) is not
stored in the week count register (WEEK) automatically. After reset release, set the week count
register as follow.
Caution 2. When it reads or writes from/to the register while the counter is in operation (RTCE = 1), follow the
procedures described in the section 9.4.3 Reading/writing real-time clock.
Address: FFF95H After reset: 00H R/W
Symbol76543210
WEEK00000WEEK4WEEK2WEEK1
Day WEEK
Sunday 00 H
Monday 01 H
Tuesday 02 H
Wednesday 03 H
Thursday 04 H
Friday 05 H
Saturday 06 H
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