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:
Jul. 07, 1998
Filed:
Jun. 19, 1996
Paul H Hofhine, Mesa, AZ (US);
Microchip Technology Incorporated, Chandler, AZ (US);
Abstract
A microcontroller operates in response to application of a power supply voltage within a predetermined range of values between upper and lower limits. A power-on reset (POR) circuit generates an output pulse upon initial application of the power supply voltage within that range of values after a predetermined period of time without power. In response to a reduction of power supply voltage to a value below the lower limit at the microcontroller for a sustained interval of time greater than the predetermined period of time, a reset pulse is generated to interrupt operation of the microcontroller. In response to restoration of the power supply voltage to the microcontroller to a value above said lower limit, another reset pulse is initiated to restore operation of the microcontroller. Upon reduction of the power supply voltage to a value below the lower limit for the sustained interval of time, any timing capacitances in the POR circuit are discharged, so that when the power is removed, the POR circuit is initialize to a fully discharged and power off condition, in preparation for generating a reset pulse when the power supply voltage is restored to a value above the lower limit. A time delay is imposed in the response to a reduction of power supply voltage to a value below the lower limit at the microcontroller for a sustained interval of time less than the predetermined period of time.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile