Interconnect failure detection and cache reset apparatus
US5680575A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 17, 1995 |
| Grant date | Oct 21, 1997 |
| Priority date | — |
| Expiry date | May 17, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L69/324
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A system for resetting a cache in a first device connected by a multilinelink to a memory in a second device. A transceiver in the first element connects to one end of each of the link lines and a transceiver in the second device connects to the other end. The transmitter in the first device transceiver is disabled in response to a failure of the transceiver to receive messages from the second device. The transmitter in the first device transceiver also selectively sends a reset sequence to the receiver in the second device. A detector detects when all of the receivers in the second device have either received a reset sequence or have detected that a transmitter in the first device is disabled. The detector sets a latch in response, representing that data in the second device cache is invalid. Optionally, the second device has responders which send responses over the link lines indicating receipt of a reset sequence. The transmitters in the first device switch to a disabled state when the responses are not received within a specified period.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.