Data transfer control device and electronic equipment
US6725413B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 14, 2001 |
| Grant date | Apr 20, 2004 |
| Priority date | — |
| Expiry date | Jan 3, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L12/6418
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
An objective of the present invention is to provide a data transfer control device and electronic equipment that reduce the processing overheads of firmware and enable the implementation of high-speed data transfer. When a header CRC error occurs in a data transfer control device in accordance with the IEEE 1394 standard, the header pointer returns to the previous position to invalidate that packet. When Unktcode occurs, the packet is not written to RAM and the packet is invalidated. No reception completed status is generated. A register for holding the header CRC error status is provided. When there is a data CRC error, a data pointer returns the previous position without returning the header pointer. A first mode in which received broadcast packets are invalidated and a second mode in which they are validated may be set so that when a broadcast packet is received in the first mode, that packet is not written to RAM.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.