non-volatile storage

Abstract

Abstract PURPOSE:To hold stored data even after a power supply is cut off by using an EEPROM as a semiconductor memory and applying an address allocating system to write data continuously and in order on plural EEPROM for each byte or word. CONSTITUTION:A memory board contains 16 pieces or 16 sets of EEPROM m1-m16 to which access is possible for each word and has the storage capacity of 256k bytes (128k words). Then the EEPROM m1-m16 are connected to an address buffer ABF and a data buffer DBF via an internal address bus A-BUS and an internal data bus D-BUS respectively. The 13 bits of address signals A5-A17 are supplied to the EEPROM m1-m16 out of those address signals A1-A23 which are fetched to an address buffer ABF from a system bus S-BUS. Thus the data are read out and written for each word.

Inventors

• 👤 Mitsuyuki Kawachi
• 👤 河内　満幸

Bibliographic Details