Information processing apparatus and method and storage medium
US6771668B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 20, 1998 |
| Grant date | Aug 3, 2004 |
| Priority date | — |
| Expiry date | Apr 20, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L12/6418
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A host device logs in a printer as a print data transfer destination to acquire type information of the printer and issues SB_CONT.req to determine whether a cycle master necessary for isochronous transfer is present on a serial bus. The print data transfer mode and transfer parameter are set in accordance with the presence/absence of the cycle master and the acquired type information. If the cycle master is present on the serial bus, isochronous transfer is set as the transfer mode; otherwise, asynchronous transfer is set as the transfer mode. Therefore, even when devices without any cycle master function are connected, or no cycle master is present on the bus, print data can be transferred from the host device to the printer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.