Optical communications – Transmitter – Having particular modulation
Patent
1996-12-13
1999-09-21
Tu, Trinh L.
Optical communications
Transmitter
Having particular modulation
371 212, 371 103, 365200, 365201, G06F 1100, G06C 2900, G11C 700
Patent
active
059544350
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 is 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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Mitsubishi Denki & Kabushiki Kaisha
Tu Trinh L.
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