Static information storage and retrieval – Addressing – Particular decoder or driver circuit
Patent
1997-09-25
1999-02-02
Nelms, David
Static information storage and retrieval
Addressing
Particular decoder or driver circuit
365120, G11C 800
Patent
active
058674446
ABSTRACT:
A programmable memory device including a register that stores a programmable mode select bit, a data input, a control input and decode circuitry that decodes the mode select bit to determine whether the memory device operates in either a check mode or a mask mode. The control input receives at least one control bit for each data byte received by the memory device during a write operation or cycle. The function of the control bit(s) depends upon the mode select bit. In a check mode of operation, each control bit functions as a parity/check bit for a corresponding data byte, where the memory device stores the check bit with its corresponding data byte during each write cycle. In the mask mode of operation, each control bit functions as a mask bit for a corresponding data byte, where the memory device selectively stores or masks the data byte depending upon the state of the corresponding mask bit.
REFERENCES:
patent: 5267204 (1993-11-01), Ashmore, Jr.
patent: 5539696 (1996-07-01), Patel
patent: 5737761 (1998-04-01), Holland et al.
Le Hung Q.
Olarig Sompong P.
Compaq Computer Corporation
Lam David
Nelms David
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