rtc-4553ac Epson Electronics America, Inc., rtc-4553ac Datasheet - Page 17

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

RTC – 4553AC
Note 1
Note 2
(3) Time/calendar modify example using
(5) Time/calendar read example
NO
NO
counter reset (8:00
Increment 1-hour digit
Read time/calendar
If processing is not completed within 3.8 ms, check the BUSY bit again.
Reset (CNTR
digit in example (3)]. Consequently, to change the setting from 11:00 to 2:00, the hour digit must be
reset (CNTR
For the year, CNTR is used separately for the 1-year digit and 10-year digit. Performing CNTR on the
1-year digit does not change the 10-year digit. Conversely, performing CNTR on the 10-year digit does
not change the 1-year digit.
Write hour digit
BUSY = 0?
PONC=0?
BUSY = 0?
CNTR
CNTR
START
START
(2 times)
MS
MS
END
END
0
1
YES
0
0
YES
1
0
YES
2:00)
If PONC = "1", initialization was
carried out and data must be set
again
"1").
"1") applies to the digits for which writing was performed [1-hour digit and 10-hour
If BUSY = "0", there will
be no carry for at least
3.8 ms.
MS
NO
( 8
( 0
0
="0", MS
0 )
1
2 )
1
="0"
Page - 14
(4) RAM write example
(6) RAM read example
Write to RAM in MODE 1
Write to RAM in MODE 1
Read MODE 1 RAM
Read MODE 2 RAM
PONC=0?
START
START
MS
MS
MS
MS
MS
MS
MS
MS
MS
MS
END
END
0
1
0
1
0
1
0
1
0
1
YES
0
1
1
1
0
0
1
1
0
1
If PONC = "1", initialization was
carried out and data must be set
again
Set MODE 1
Set MODE 1
Set MODE 2
Set MODE 2
NO
MQ - 342 - 01