SH7706 Datasheet, PDF (387/749 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperH™ RISC engine Family/SH7700 Series

Section 13 Realtime Clock (RTC)
Section 13 Realtime Clock (RTC)
This LSI has a realtime clock (RTC) with its own 32.768-kHz crystal oscillator. A block diagram
of the RTC is shown in figure 13.1.
13.1 Feature
The RTC has following features:
• Clock and calendar functions (BCD display): seconds, minutes, hours, date, day of the week,
month, and year
• 1-Hz to 64-Hz timer (binary display)
• Start/stop function
• 30-second adjust function
• Alarm interrupt: frame comparison of seconds, minutes, hours, date, day of the week, and
month can be used as conditions for the alarm interrupt
• Cyclic interrupts: the interrupt cycle may be 1/256 second, 1/64 second, 1/16 second, 1/4
second, 1/2 second, 1 second, or 2 seconds
• Carry interrupt: a carry interrupt indicates when a carry occurs during a counter read
• Automatic leap year correction
Rev. 5.00 May 29, 2006 page 339 of 698
REJ09B0146-0500