user manual

Functional Description
2-17
2
Battery Backed Up RAM and Clock
The MK48T08 RAM and clock chip is a 28-pin package that
provides
❏ A time-of-day clock
❏ An oscillator
❏ A crystal
❏ Power fail detection
❏ Memory write protection
❏ 8KB of RAM
❏ A battery
The clock provides
❏ Seconds, minutes, hours, day, date, month, and year in BCD
24-hour format
❏ Automatic corrections for 28-, 29- (leap year), and 30-day
months
No interrupts are generated by the clock.
The MK48T08 is an 8 bit device; however, the interface provided by
the PCCchip2 supports 8-, 16-, and 32-bit accesses to the MK48T08.
Refer to the MK48T08 data sheet for detailed programming
information.