Nonvolatile memory card with a single power supply input

Details Nonvolatile memory card with a single power supply input Nonvolatile memory card with a single power supply input

1992-03-31

1993-11-30

Fears, Terrell W.

Static information storage and retrieval

Powering

365 52, 36518901, 365900, G11C 1300

Patent

active

052672182

ABSTRACT:
A nonvolatile memory card is described. The nonvolatile memory card includes a plurality of memories arranged in an array. Each of the plurality memories includes memory cells that are electrically programmable and electrically erasable. Each of the plurality of memories requires a device power supply voltage and a reprogramming voltage. The memory card also includes the device power supply input for receiving a power supply voltage for the memory card, and voltage conversion means coupled to receive the device power supply voltage at the power supply input for providing the device power supply voltage to the plurality of memories and for generating the reprogramming voltage for erasing and programming the plurality of memories. The voltage conversion means further includes (1) a charge pump coupled to the power supply input for generating the reprogramming voltage for erasing and programming the plurality of memories, and (2) a control logic coupled to the charge pump for allowing the charge pump to generate the reprogramming voltage. The control logic causes the charge pump not to generate the reprogramming voltage when the memory card does not require a reprogramming operation in order to protect data integrity of the memory card. When the memory card requires a reprogramming operation, the control logic causes the charge pump to generate the reprogramming voltage.

REFERENCES:
patent: 5197033 (1993-03-01), Watanabe et al.
M. A. Levy and D. Elbert, Solutions for High Density Applications Using Intel Flash Memory (Oct. 1990), 1991 Memory Products Handbook, Intel Corporation, pp. 6-297 through 6-344 (1990).
D. Verner, Designing an Updatable BIOS Using Flash Memory, 1991 Memory Handbook, Intel Corporation, pp. 6-248 through 6-296 (Oct. 1990).
Data Sheets for the iMC004FLKA, 1991 Memory Products Handbook, Intel Corporation, pp. 6-173 through 6-202 (Oct. 1990).
S. Zales and D. Elbert, Using Flash Memory for In-System Reprogrammable Nonvolatile Storage, (Oct. 1990), 1991 Memory Products Handbook, Intel Corporation, pp. 6-203 through 6-247 (1990).
PC Card Standard, Release 1.0, Personal Computer Memory Card International Association, pp. 1-102 (Sep. 1991).
PC Card Standard, Release 2.0, Personal Computer Memory Card International Association, pp. 1-1 through 6-38 (Sep. 1991).
D. A. Patterson, J. L. Hennessy, and D. Goldberg, Computer Architecture a Quantitative Approach, Morgan Kaufmann Publishers, Inc., p. 519 (1990).

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