On-chip monitor circuit and semiconductor chip
US10776484B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Jan 12, 2016 |
| Grant date | Sep 15, 2020 |
| Priority date | — |
| Expiry date | Jan 12, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R31/31719
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Provided is an on-chip monitor circuit mounted on a semiconductor chip that is equipped with a security function module for performing a security function process on an input signal and outputting a security function signal, the on-chip monitor circuit comprising a monitor circuit for monitoring signal waveforms of the semiconductor chip, wherein the circuit is provided with a first storage means for storing data that designates a window period in which to perform a test of the semiconductor chip, and a control means for performing control to operate the circuit during the window period, when a prescribed test signal is inputted to the security function module. By using the on-chip monitor circuit in a semiconductor chip of which security is required, security attacks, e.g., a Trojan horse or the like, intended to embed a malicious circuit in the production stage of security function module-equipped semiconductors chips, can be prevented.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.