The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 06, 1996
Filed:
May. 27, 1993
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
A memory control circuit for controlling a memory chip enable signal without unnecessary power consumption in a non-volatile memory chip during the backup state. When a backup signal (BUP) shows that the card is in a backup state, all of the memory chip enable signal output lines are set to a high-impedance state by controlling a backup time control means inserted therein, and pull-up resistors 20 are connected to the memory chip enable signal output lines 8 connected to the volatile memory chip 2 for setting them to a 'H' level, and an A power source 5 without backup is connected to the memory chip enable signal output lines 8 connected to the non-volatile memory chip 3 through a pull-up resistor 30, thereby preventing unnecessary current from flowing.