Semiconductor, memory card, and data processing system

Details Semiconductor, memory card, and data processing system Semiconductor, memory card, and data processing system

1999-02-16

2000-04-04

Nelms, David

Static information storage and retrieval

Floating gate

Multiple values

36518517, 36518522, G11C 1604

Patent

active

060469366

ABSTRACT:
Externally supplied program data is latched into data latch circuits DLL and DLR. A judgment is made as to whether or not the latched program data corresponds to any threshold value of multi-levels every time each of plural programing operations is carried out. The program control information corresponding to the judgment result is latched into a sense latch circuit SL. Based upon the latched program control information, the programing operation for setting threshold voltages having multi-levels to a memory cell is carried out in a stepwise manner. Even when the programing operation is ended, the externally supplied program data is left in the data latch circuit. Even when the programing operation of the memory cell is retried due to the overprograming condition, the program data is no longer required to be again received from the external device.

REFERENCES:
patent: 5570315 (1996-10-01), Tanaka et al.
patent: 5602789 (1997-02-01), Endoh et al.
patent: 5870218 (1999-02-01), Jyouno et al.

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