System and method in a modem for providing a shortened reset pulse upon receipt of an external reset pulse
US6557108B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 28, 1999 |
| Grant date | Apr 29, 2003 |
| Priority date | — |
| Expiry date | May 28, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F1/24
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A system and method for providing a shortened DSP reset pulse to cause a modem to reset and enter a sleep mode as soon as possible after receipt of an external reset pulse issued by a host. A reset controller detects the external reset pulse, issues a separate reset pulse to the modem, monitors the modem's clock and then terminates the separate reset pulse after a prescribed duration. The prescribed duration is determined by the minimum time required by the DSP to reset. The invention is embodied in a modem connected to an external controller. The modem includes a DSP having a reset terminal and a clock. The DSP begins performing a reset upon a first signal applied to its reset terminal and causes the modem to enter a sleep-mode after a second signal is applied to its reset terminal. The external controller is capable of transmitting an external signal. The reset controller in the modem has a counter and an output node. The counter is connected to the clock and provides a counter output signal upon receipt of a predetermined number of cycles of the clock. The counter initiating generally concurrent with receipt of the external signal. The output node is connected to the reset termi…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.