Realtime Clock; Features - Renesas RZ/A Series User Manual

RZ/A1L Group, RZ/A1LU Group, RZ/A1LC Group
13.

Realtime Clock

This LSI has a realtime clock and a 32.768-kHz crystal oscillator.
13.1

Features

• Clock and calendar functions (BCD format): Seconds, minutes, hours, day of the week, day, 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: Comparison with seconds, minutes, hours, day of the week, day, month, or year can be selected as
a condition for the alarm interrupt
• Periodic interrupt: the interrupt cycle may be 1/64 second, 1/16 second, 1/4 second, 1/2 second, 1 second, or 2
seconds
• Carry interrupt: a carry interrupt indicates that a second counter carry is generated or a 64-Hz counter carry is
generated reading the 64-Hz counter
• Automatic leap year adjustment
• The external clock signal input for internal operation or the external clock signal input dedicated to the clock
operation can be selected as the operating clock signal for the clock function.
• Recovery from deep standby mode can be performed by an alarm interrupt.
R01UH0437EJ0600 Rev.6.00
Jan 29, 2021
13. Realtime Clock
13-1