FIFO data storage system using PLA controlled multiplexer for concurrent reading and writing or registers by different controllers
This patent describes a data storage device for storage and retrieval of data by first and second control units. It comprises: a first register comprising first data storage means, and means for multiplexing data between one of the first and second control units and the first data storage means; a second register comprising second data storage means. The second data storage means comprising means for receiving data from the first data storage means. The second register comprising means for allowing data to be retrieved from the second data storage means by the first and second control units; and a controller electrically connected to at least one of the first or second register and receiving a clock signal CLOCK, a read request SYDARD synchronized with the clock signal, a write request SYDAWR synchronized with the clock signal and a reset signal RESET; wherein the controller is operative to control the data transfer from the first register to the second register by means of a signal SHIFT and to output a register full status signal DRF and a register empty status signal.
- Assignee:
- AMP Inc., Harrisburg, PA
- Patent Number(s):
- US 4894797; A
- Application Number:
- PPN: US 7-210147A
- OSTI ID:
- 7159535
- Resource Relation:
- Patent File Date: 16 Jun 1988
- Country of Publication:
- United States
- Language:
- English
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