Data processing system including apparatuses connected via a bidirectional bus to each other and data transfer method for use with the same
US6438634B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 27, 1999 |
| Grant date | Aug 20, 2002 |
| Priority date | — |
| Expiry date | Jul 27, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F13/4059
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
In a system in which data transfer interfaces respectively of apparatuses are connected via a bidirectional bus to each other, the availability ratio of the bus is improved. An apparatus to issue read and write requests includes a write buffer to store write data and a bus changeover unit to monitor an operation status of the bus for a read data transfer. The apparatus immediately sends a read request via the bus to a communication partner and then receives read data via the bus from the partner. A write request and associated write data are once stored in the write buffer. When a predetermined number of write data is accumulated, a data transfer direction of the bus is changed if the bus is not being used by a read data transfer to successively transmit the write requests and write data thereof to the partner.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.