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Section 13 Realtime Clock (RTC)
13.1
Overview
The SH7709S has a realtime clock (RTC) with its own 32.768-kHz crystal oscillator.
13.1.1
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
Содержание SH7709S
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Страница 292: ...273 T1 CKIO A25 to A0 CSn RD WR RD D31 to D0 WEn D31 to D0 BS T2 Read Write Figure 10 6 Basic Timing of Basic Interface ...
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