Memory arbitration between timekeeping circuitry and general pur

Details Memory arbitration between timekeeping circuitry and general pur Memory arbitration between timekeeping circuitry and general pur

1991-01-22

1993-03-23

Anderson, Lawrence E.

Boots, shoes, and leggings

3649672, 3649664, 3649693, 364934, 364DIG2, 395550, G06F 1314

Patent

active

051971429

ABSTRACT:
Arbitration logic is provided to receive conflicts between a timekeeping system and a user system which share a common memory. The common memory is comprised of an array of dual memory cells, each of which has a timekeeping cell and a user cell and circuitry for transferring data from the timekeeping cell to the user cell or from the user cell to the timekeeping cell. User data is written into the user cells when it is available and immediately thereafter is transferred from the user cells to the timekeeping cells. Data from the timekeeping system is inhibited from being written into the timekeeping cells if, during the present update cycle of the timekeeping system, the user writes data into the common memory.

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DS1215 Preliminary Data Sheet from 1987 Data Book.

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