NON-VOLATILE SEMICONDUCTOR MEMORY DEVICE AND SEMICONDUCTOR DISK DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a non-volatile semiconductor memory device in which each bank can be externally controlled and to provide a semiconductor disk device in which the next write operation can be performed directly to a bank being made a ready state of a non-volatile semiconductor memory. SOLUTION: A write operation from a data register into a memory cell can be performed independently for each bank, and transfer of write data from the outside to a data register of each bank can be performed even when a write operation from a data register to a memory cell is being performed in the other bank.