摘要 |
<p>PROBLEM TO BE SOLVED: To shorten a write-in time of a non-volatile memory. SOLUTION: When the whole contents of one page of a flash memory 1 are rewritten, in supplying power and initializing a microcomputer 9, as a value of a register 12 is made a logic value '1' in hardware independently of program processing, an instruction signal PAGEWRT of a logic value '0' is supplied to a write-in control circuit 10, and write-in operation of the flash memory 1 is controlled. That is, in a series of rewriting sequence in the flash memory 1. output operation of existing data for page buffers 5, 6 of the flash memory 1 can be inhibited, and a write-in time can be largely reduced. Especially, as the flash memory 1 has a long write-in time of several msec per one cell, it shows a remarkable effect.</p> |