rtc-4553ac Epson Electronics America, Inc., rtc-4553ac Datasheet - Page 16

• Manufacturer Part Number: rtc-4553ac
• Description: Real Time Clock Module
• Manufacturer: Epson Electronics America, Inc.

RTC – 4553AC
8.3.5. Sample Operation Flow Charts
(1) Time/calendar initialize example
(2) Time/calendar modify example (8:00
(Example for initialization through power-on-clear when battery was changed etc.)
NO
NO
Increment 1-month digit and
Set 24/12-hour format
Increment 1-minute digit and
Increment day of the
Increment 1-year digit and
Increment 1-day digit and
Increment 1-hour digit
week digit <?>
Increment 1-hour digit
30ADJ
10-month digit
10-minute digit
SYSR
BUSY = 0?
10-year digit
BUSY = 0?
10-day digit
START
START
(4 times)
END
END
YES
YES
1
1
MS0=0, MS1=0
While BUSY = "1", a carry operation is in progress and
the setting should not be carried out.
4 times (8
10-hour digit is automatically carried.
The processing should be completed within 3.8 ms after
detecting BUSY = "0".
12:00)
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9
Release PONC bit = "1" (1
While BUSY = "1", a carry operation is in progress
and the setting should not be carried out. The
following processing steps must be completed within
996 ms after SYSR
transition was detected. If the process takes longer,
the BUSY bit must be checked again for continued
processing.
It is advisable to start the setting from the year digit,
to prevent setting nonexistent data.
When the 1-digit of the year, month, day, hour,
minute, or second is set, carry to the 10-digit can
occur.
It is advisable to set this before setting the hour digit,
to prevent setting nonexistent data.
Set the 10-hour digit by incrementing the 1-hour
digit.
10
11
12)
"1" or after the BUSY bit down
0)
MQ - 342 - 01