Watch dog timer device
US6378083B1 · kind B1 · utility
6Cited by
17References
22Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 26, 1996 |
| Grant date | Apr 23, 2002 |
| Priority date | — |
| Expiry date | Dec 27, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F11/0757
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A watch dog timer capable of detecting a runaway state of a system including a CPU and DMAC has a watch dog timer and a count clock controller. The watch dog timer counts the number of clock and stores a count result, and transmits a watch dog time out signal to other devices in the system if the number of clocks is over a predetermined value. The count clock controller receives the clock and transmits the clock to the watch dog timer, and halts the transmission of the clock to the watch dog timer when the CPU transmits a bus permission signal to the DMAC.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.