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Title:
MEMORY CARD AND ITS DATA WRITING AND ERASING METHOD
Document Type and Number:
Japanese Patent JPH05166390
Kind Code:
A
Abstract:

PURPOSE: To eliminate complex writing and erasing operations from an external system by incorporating a write command generating means, a write time generating timer means, a write verify command generating means, a write time generating timer means and similar erasing means.

CONSTITUTION: A memory card CPU 2 which incorporates a flash E2 PRIM orderly controls a write command generating means 3 which is incorporated in a card 1, a write time generating timer means 4, a write verify command generating means 5, a write time generating timer means 6 and a data writing to the E2 PROM 15 executed. An erasing 15 similarly done and the numbers of writing and erasing are counted by a writing and erasing counter 7, prohibits data writing and erasing for a specific duration, the counter results are transmitted to an external system 13 through a nonvolatile memory 12. Having this constitution, complex writing and erasing operations are eliminated from the external system and easy and sure writing and erasing are executed.


Inventors:
HASHIMOTO TETSUYA
Application Number:
JP1991000330651
Publication Date:
July 02, 1993
Filing Date:
December 13, 1991
Export Citation:
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Assignee:
RICOH KK
International Classes:
G11C16/02; G06F12/00; G11C16/06; G11C17/00; (IPC1-7): G06F12/00; G11C16/06
Attorney, Agent or Firm:
武田 元敏



 
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