SH7263 Datasheet, PDF (717/1862 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7260 Series

Section 14 Realtime Clock (RTC)
Section 14 Realtime Clock (RTC)
This LSI has a realtime clock (RTC) with its own 32.768-kHz crystal oscillator.
14.1 Features
• Clock and calendar functions (BCD format): Seconds, minutes, hours, date, day of the week,
month, and year
• 1-Hz to 64-Hz timer (binary format)
64-Hz counter indicates the state of the RTC divider circuit between 64 Hz and 1 Hz
• Start/stop function
• 30-second adjust function
• Alarm interrupt: Frame comparison of seconds, minutes, hours, date, day of the week, month,
and year can be used as conditions for the alarm interrupt
• Periodic 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 adjustment
Rev. 2.00 Mar. 14, 2008 Page 683 of 1824
REJ09B0290-0200