Filter
Top Products
Section 14 Realtime Clock
R01UH0134EJ0400 Rev. 4.00 Page 675 of 2108
Sep 24, 2014
SH7262 Group, SH7264 Group
Section 14 Realtime Clock
This LSI has a realtime clock and a 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 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
Either the external clock signal dedicated for the clock function or the internal signal can be
selected as the operating clock signal for the clock function.
Recovery from deep standby mode can be performed by an alarm interrupt.