HD64F38602R Datasheet, PDF (217/552 Pages) Renesas Technology Corp – Renesas 16-Bit Single-Chip Microcomputer

Section 11 Realtime Clock (RTC)
Section 11 Realtime Clock (RTC)
The realtime clock (RTC) is a timer used to count time ranging from a second to a week.
Interrupts can be generated ranging from 0.25 seconds to a week. Figure 11.1 shows the block
diagram of the RTC.
11.1 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 (0.25 seconds, 0.5 seconds, one second, minute, hour, day, and week) interrupts
• 8-bit free running counter
• Selection of clock source
• Use of module standby mode enables this module to be placed in standby mode independently
when not used. (The RTC is operating as the initial value. For details, refer to section 5.4,
Module Standby Function.)
RTC3000A_000120030300
Rev. 3.00 May 15, 2007 Page 185 of 516
REJ09B0152-0300