Semiconductor memory element

Abstract

Abstract PURPOSE:To easily confirm whether an EPROM is erased or not without reading the contents of all addresses by reading a memory cell for storing whether the EPROM is brought into an erasing state or not as information. CONSTITUTION:A single or plural memory cells 8 capable of programming as the information whether memories are brought into the erased state or not in a part of the chip of the programmable and erasable read only memory (EPROM). Thereby, the memory cell 8 is read to recognize whether the EPROM is erased or not without reading all the addresses of the memory 1. Namely, the memory cell having the contents that the EPROM is programmed or erased is provided in the chip, thereby, the state of the EPROM can be readily understood only by reading the memory cell.

Inventors

• 👤 Mikito Nakabayashi
• 👤 中林　幹戸

Bibliographic Details