Circuitry for testing non-maskable voltage monitor for power management block
US10620267B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 20, 2017 |
| Grant date | Apr 14, 2020 |
| Priority date | — |
| Expiry date | Dec 18, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K19/20
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method of operating an electronic device during test mode operation of a duplicated voltage monitor includes sensing a functional supply voltage with a voltage monitor, deasserting an output of the voltage monitor if the functional supply voltage is exceeds a threshold, and asserting output of the voltage monitor if the functional supply voltage falls below the threshold. A test supply voltage is sensed with the duplicate voltage monitor, output of the duplicate voltage monitor is deasserted if the test supply voltage exceeds a threshold, and output of the duplicate voltage monitor is asserted if the test supply voltage falls below the threshold. Output of the duplicate voltage monitor is monitored to thereby determine the threshold based upon assertion of the output of the duplicate voltage monitor, and performing a logical operation between outputs of the voltage monitor and the duplicate voltage monitor to generate a power on reset signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.