Transmission of status information by a selected one of multiple transfer modes based on the cause for sending the status information
US6434643B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 14, 1999 |
| Grant date | Aug 13, 2002 |
| Priority date | — |
| Expiry date | Apr 14, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/1284
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A peripheral device and peripheral device control method assure the immediacy of status information while opening the greatest possible bandwidth when communicating status information using a USB interface enabling simultaneous access to a plurality of peripheral devices. A first transfer function enables sending status information to a peripheral device such as a printer using the USB bulk transfer type, and a second transfer function enables sending status information using the USB interrupt transfer type. Status information sent in response to a host request where the host can control the timing of status information transfers is sent by bulk transfer using the first transfer function, thereby assuring bandwidth for bulk transfers. Autonomous status information communicated at a timing unknown to the host is communicated by the second transfer function using the short transfer period interrupt transfer type, thereby assuring the immediate communication of the status information.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.