CONTROL CIRCUIT FOR NON-VOLATILE MEMORY

摘要

PROBLEM TO BE SOLVED: To prevent miss erasing and miswriting of a non-volatile memory equipped with an address holding circuit, having an reset signal input. SOLUTION: A reset control means is provided to a memory control circuit, equipped with an address hold circuit having an reset input. The reset control means delays a system reset signal RST1X, by at least the time interval until each control signal output from a register circuit 4 is initialized, namely, until a sequence of completion of operations of erasing and writing and outputs the system reset signal RST1X as a second system reset signal RST2X. An address hold circuit 2 initializes address data, in response to the second reset signal RST2X. Accordingly, when a reset signal is produced during performing of the sequence of write and erasure of the non-volatile memory, the miss erasing and miswriting of the non-volatile memory can be prevented surely.