Datasheet

CHAPTER 9 REAL-TIME COUNTER
User’s Manual U18698EJ1V0UD
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9.4 Real-Time Counter Operation
9.4.1 Starting operation of real-time counter
Figure 9-18. Procedure for Starting Operation of Real-Time Counter
Setting AMPM, CT2 to CT0
Setting MIN
RTCE = 0
Setting SEC (clearing RSUBC)
Start
INTRTC = 1?
Stops counter operation.
Selects 12-/24-hour system and interrupt (INTRTC).
Sets second count register.
Sets minute count register.
No
Yes
Setting HOUR
Sets hour count register.
Setting WEEK
Sets week count register.
Setting DAY
Sets day count register.
Setting MONTH
Sets month count register.
Setting YEAR
Sets year count register.
Clearing IF flags of interrupt
Clears interrupt request flags (RTCIF, RTCIIF).
Clearing MK flags of interrupt
Clears interrupt mask flags (RTCMK, RTCIMK).
RTCE = 1
Starts counter operation.
Reading counter