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. 16, 2021
Filed:
May. 12, 2020
Winbond Electronics Corp., Taichung, TW;
Naoaki Sudo, Yokohama, JP;
WINBOND ELECTRONICS CORP., Taichung, TW;
Abstract
A semiconductor memory device that can reduce power consumption and precisely perform a power-down operation while a testing operation is underway is provided. A flash memory of the invention has a low-power voltage-detection circuit, a high-precision voltage-detection circuit, and a controller. The low-power voltage-detection circuit detects the supply voltage falling to a constant voltage. The high-precision voltage-detection circuit detects the supply voltage falling to the constant voltage. The controller selects the high-precision voltage-detection circuit when the internal circuit is being tested, and it selects the low-power voltage-detection circuit when the internal circuit is not undergoing a test. The controller responds to the detection result from the low-power voltage-detection circuit or the high-precision voltage-detection circuit by performing a power-down operation.