rtc-4553ac Epson Electronics America, Inc., rtc-4553ac Datasheet - Page 20

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

RTC – 4553AC
8.3.11. Processing of Non-Existent Data
(1) If the month digit is incremented while the current setting is January 31, a non-existent setting will result
(2) If the year digit is incremented while the current setting is February 29 of a leap year, a non-existent setting will
(3) When the 10-day digit is incremented past "31", the day digit counter becomes "01".
(4) When the 10-month digit is incremented, the month digit overflow processing will differ according to the month.
(February 31). Carry from the hour digit will cause this setting to become March 1.
result (February 29 of a non-leap year). Carry from the hour digit will cause this setting to become March 1.
When the following non-existent data are set (February 30), incrementing the 10-day digit causes an overflow in
the 10-day digit, clearing the 1-day digit.
When a valid date is set, overflow of the 10-day digit does not clear the 1-day digit.
Non-existent
Feb. 29 00
month
Feb. 30
Feb. 29
Jan. 31
Mar. - Sep.
00 month
incremented once
Nov.
Dec.
Oct.
incremented
incremented
10-day digit
Month digit
Year digit
10-month digit incremented once
Feb. 29 01
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Feb. 31
Feb. 00
Feb. 01
00 month
Feb.
Jan.
Jan.
Oct.
Carry from hour digit
Carry from hour digit
incremented once
10-day digit
Non-existent
month
Mar. 01 01
Mar. 01
Feb. 10
MQ - 342 - 01