SH7727 Datasheet, PDF (529/1109 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperH RISC engine Family/SH7700 Series

Section 16 Realtime Clock (RTC)
Section 16 Realtime Clock (RTC)
16.1 Overview
This LSI has a realtime clock (RTC) with its own 32.768-kHz crystal oscillation circuit.
16.1.1 Features
The RTC has the following features:
• Clock and calendar functions (BCD display): Seconds, minutes, hours, date, day of the week,
month, and year
• 1 to 64-Hz timer (binary display)
• Start/stop function
• 30-second adjustment
• Alarm interrupt:
Frame comparisons of seconds, minutes, hours, date, day of the week, and month can be
selected for the alarm interrupt condition
• Periodic interrupts:
The interrupt cycle can be selected from 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 Dec 12, 2005 page 457 of 1034
REJ09B0254-0500