Battery Backed Up Ram And Clock - Motorola MVME167 Series Installation Manual

Battery Backed Up RAM and Clock

The MK48T08 RAM and clock chip is a 28-pin package that
provides:
The clock provides
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.
A time-of-day clock
An oscillator
A crystal
Power fail detection
Memory write protection
8KB of RAM
A battery
Seconds, minutes, hours, day, date, month, and year in BCD
24-hour format
Automatic corrections for 28-, 29- (leap year), and 30-day
months
Functional Description
2-17
2