Method and circuit for reading fuse cells in a nonvolatile...

Details Method and circuit for reading fuse cells in a nonvolatile... Method and circuit for reading fuse cells in a nonvolatile...

2005-09-26

2008-10-07

Hoang, Huan (Department: 2827)

Static information storage and retrieval

Read/write circuit

Including signal comparison

C365S185220

Reexamination Certificate

active

07433247

ABSTRACT:
A method and circuit are described for ensuring a properly operational power-up read of fuse cells in a nonvolatile memory by selecting predefined data for loading in a portion of a fuse memory and matching the reading of the predefined data during power-up with the predefined data, thereby indicating a proper power-up read of fuse cells. The fuse memory is partitioned into a first section of fuse cells for conducting a pre-check procedure to match a first predefined data being read against the first predefined data, a second section for reading main fuse cells to match with a second predefined data being read against the second predefined data, and a third section of fuse cells for conducting a post-check procedure to match a third predefined data being read against the third predefined data.

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Macronix International Co., Ltd., MXIC MX29LV169T/B & MX29LV160AT/AB, 16M-Bit [2M×8/1M×16] CMOS Single Voltage 3V Only Flash Memory, Rev. 3.7, Apr. 23, 2003, 66 pages.

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