Datasheet

Section 10 Realtime Clock (RTC)
RTC3000A_000120030300 Rev. 2.00 Sep. 23, 2005 Page 141 of 472
REJ09B0160-0200
Section 10 Realtime Clock (RTC)
The realtime clock (RTC) is a timer used to count time ranging from a second to a week. Figure
10.1 shows the block diagram of the RTC.
10.1 Features
• Counts seconds, minutes, hours, and day-of-week
• Start/stop function
• Reset function
• Readable/writable counter of seconds, minutes, hours, and day-of-week with BCD codes
• Periodic (seconds, minutes, hours, days, and weeks) interrupts
• 8-bit free running counter
• Selection of clock source