| 摘要 |
Volatile electronic counter provides data output signals, e.g. four BCD stage counts, and four cyclically changing address signals normally used to drive a display. A area power down detector operates to initiate transfer of the count to successive locations in a non-volatile memory addressed using the address signals from the counter. When power is restored successive memory locators are addressed and compared with the corresponding count stage which is incremented until equal when the next memory location is accessed in order to restore the count. |
