CHAPTER 9 REAL-TIME COUNTER
User’s Manual U19780EJ2V0UD
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Figure 9-20. Procedure for Writing Real-Time Counter
Writing MIN
RWAIT = 1
Writing SEC
Start
RWST = 1?
Stops SEC to YEAR counters.
Mode to read and write count values
No
Yes
Writing HOUR
Writing WEEK
Writing DAY
Writing MONTH
Writing YEAR
RWAIT = 0
RWST = 0?
Note
No
Yes
Sets counter operation.
Checks wait status of counter.
End
Writes second count register.
Writes minute count register.
Writes hour count register.
Writes week count register.
Writes day count register.
Writes month count register.
Writes year count register.
Note
Be sure to confirm that RWST = 0 before setting STOP mode.
Caution Complete the series of operations of setting RWAIT to 1 to clearing RWAIT to 0 within 1 second.
Remark
SEC, MIN, HOUR, WEEK, DAY, MONTH, and YEAR may be written in any sequence.
All the registers do not have to be set and only some registers may be written.