Tamper detector power supply with wake-up
US9268972B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 6, 2014 |
| Grant date | Feb 23, 2016 |
| Priority date | — |
| Expiry date | Nov 5, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04Q9/14
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A tamper detector has tamper detection logic connected to tamper detection ports through a tamper detection interface. A real-time clock (RTC) provides a clock signal and has a battery. A processor is powered by an external power supply in a powered operational mode and has a power-off mode. In a wake-up configuration, a wake-up signal on a specific I/O port awakens the external power supply from the power-off mode to supply power to the RTC and the tamper detection interface when power from the battery is unavailable. The tamper detection ports continue to function despite removal or discharge of the battery without ESD concerns. The specific I/O port optionally may be configured for passive tamper detection.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.