Memory apparatus and data processor using the same

Details Memory apparatus and data processor using the same Memory apparatus and data processor using the same

1995-03-13

1997-07-01

Beausoliel, Jr., Robert W.

Excavating

371 216, 3642453, 3642463, G11C 2900, G06F 1100

Patent

active

056446993

ABSTRACT:
A memory apparatus and a data processor using the same comprises, a memory mechanism, having a signal input, terminal into which a predetermined signal is inputted, a memory unit consisting of first, second and third memories, a fourth memory and a control unit which replaces the first or second memory with the third memory by switching electrical connections between the memories of the memory unit according to information written into the fourth memory, and furthermore, an operation unit which diagnoses failures in the memory mechanism in case the predetermined signal inputted from the signal input terminal, in case the failure is diagnosed in the first memory allows the control unit to replace the first memory with the third memory by writing a first value into the fourth memory, and in case the failure is diagnosed in the second memory allows the control unit to replace the second memory with the third memory by writing a second value into the fourth memory. Since the failure in the memory array unit can be relieved, manufacturing yields of the memory apparatus and the data processor including the same are improved.

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"System, Process and Design Implications of a Reduced Supply Voltage Microprocessor," R. Allmon, et al, ISCC Digest of Technical Papers, pp. 48-49, Feb. 1990.

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