Data masking systems and methods for integrated circuit memory d

Details Data masking systems and methods for integrated circuit memory d Data masking systems and methods for integrated circuit memory d

1999-09-27

2000-08-15

Mai, Son

Static information storage and retrieval

Addressing

Plural blocks or banks

365203, G11C 800

Patent

active

061046620

ABSTRACT:
Data masking is performed for an integrated circuit memory device, by generating a pulse in response to a data masking signal that is received on one of a plurality of data masking pins, equalizing a plurality of groups of input/output line pairs during the pulse and precharging the plurality of groups of input/output line pairs during the pulse. The group of input/output line pairs that correspond to the data masking signal then is precharged after the pulse in response to the data masking signal that is received on the one of the plurality of data masking pins. The input and output line drivers also preferably are deactivated during the pulse and the input and output line drivers, except for the group of input and output line drivers that correspond to the one of the plurality of data masking pins, preferably are activated after the pulse. Accordingly, the input and output line pairs that correspond to data input and output pins to be masked may be precharged during the pulse, and they may be continuously precharged after the pulse. Thus, even though the input and output line pairs may have a large resistance, they can be sufficiently precharged upon masking of write data.

REFERENCES:
patent: 5404338 (1995-04-01), Murai et al.
patent: 5517462 (1996-05-01), Iwamoto et al.
patent: 5703828 (1997-12-01), Park et al.
patent: 5844848 (1998-12-01), Cho

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