HD64F3687GFPV Datasheet, PDF (175/538 Pages) Renesas Technology Corp – Old Company Name in Catalogs and Other Documents

Section 10 Realtime Clock (RTC)
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
RTC3000A_000120030300
Rev.5.00 Nov. 02, 2005 Page 141 of 500
REJ09B0027-0500