Memory controller with integrated delay line circuitry

Details Memory controller with integrated delay line circuitry Memory controller with integrated delay line circuitry

1991-12-26

1994-01-04

Richardson, Robert L.

395275, G06F 104

Patent

active

052768589

ABSTRACT:
A memory controller apparatus for controlling access to a memory array from a microprocessor and a plurality of devices is described. The memory controller apparatus interfaces the microprocessor and the plurality of devices. The microprocessor functions asynchronously with the plurality of devices. The memory controller apparatus comprises a delay line circuitry coupled to receive a selected request for accessing the memory array from one of the microprocessor and the plurality of devices, the delay line means further including means for generating a plurality of memory timing control signals. The memory timing control signals are used for accessing the memory array. The delay line circuitry functions independently of any clock signal. The delay line circuitry is only triggered by the selected request. The memory controller apparatus further comprises a memory state circuitry coupled to the delay line circuitry for controlling sequence and timing of the memory timing control signals. The memory state circuitry is clocked by the memory timing control signals. A method of generating memory timing control signals in a memory controller apparatus is also described.

REFERENCES:
patent: 4496861 (1985-01-01), Bazes
patent: 4796232 (1989-01-01), House
patent: 4975605 (1990-12-01), Bazes
patent: 4994695 (1991-02-01), Bazes
patent: 5001671 (1991-03-01), Koo et al.
patent: 5067071 (1991-11-01), Schanin et al.
patent: 5168570 (1992-12-01), Eckert et al.

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