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Clock Section 6-8
6-8 Clock
A clock is built into the CP1H CPU Unit and is backed up by a battery. The
current data is stored in the following words and refreshed each cycle.
Note The clock cannot be used if a battery is not installed or the battery voltage is
low.
Name Addresses Function
Clock data:
A351 to A354
A351.00 to A351.07 Second: 00 to 59 (BCD)
A351.08 to A351.15 Minute: 00 to 59 (BCD)
A352.00 to A352.07 Hour: 00 to 23 (BCD)
A352.08 to A352.15 Day of the month: 00 to 31 (BCD)
A353.00 to A353.07 Month: 00 to 12 (BCD)
A353.08 to A353.15 Year: 00 to 99 (BCD)
A354.00 to A354.07 Day of the week:
00: Sunday, 01: Monday,
02: Tuesday, 03: Wednesday,
04: Thursday, 05: Friday, 06: Saturday
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