Semiconductor memory device and write control method therefor

Details Semiconductor memory device and write control method therefor Semiconductor memory device and write control method therefor

2007-12-20

2010-10-12

Nguyen, Dang T (Department: 2824)

Static information storage and retrieval

Floating gate

Particular connection

C365S210130, C365S189070

Reexamination Certificate

active

07813178

ABSTRACT:
Disclosed is a semiconductor memory device which includes a read data latch that holds read data from a phase change memory and latches write data entered from outside and holds write data entered from outside, a write data latch that holds the write data for a cell for the time duration of a preset number of cycles until start of data write, a transfer switch that controls whether or not an output of the read data latch is to be transferred to the write data latch, a comparator circuit that decides whether or not data transferred to the write data latch via the transfer switch and held in the write data latch and data in the read data latch are coincident with each other, and a write flag latch that latches an output of the comparator circuit. Data is written only in case there is a write request and the result of comparison of the comparator circuit indicates non-coincidence, that is, only in bits in need of data writing.

REFERENCES:
patent: 6985395 (2006-01-01), Yoshimatsu et al.
patent: 7242605 (2007-07-01), Choi et al.
patent: 7286394 (2007-10-01), Ooishi
patent: 7313030 (2007-12-01), Lohse et al.
patent: 2001/0021120 (2001-09-01), Oowaki
patent: 60-52999 (1985-03-01), None
patent: 5-282882 (1993-10-01), None
patent: 6-76586 (1994-03-01), None
patent: 2005-100617 (2005-04-01), None
patent: 2006-302465 (2006-11-01), None
Japanese Office Action dated Nov. 18, 2008 with a partial English translation.

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