Universal serial bus peripheral bridge with sequencer
US6505267B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 19, 2001 |
| Grant date | Jan 7, 2003 |
| Priority date | — |
| Expiry date | Mar 19, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F13/4018
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A Universal Serial Bus to parallel bus bridge includes a Universal Serial Bus port that receives a serial bit stream of data and commands in a Universal Serial Bus protocol from a USB host computer. A parallel bus port on the bridge includes parallel port registers and state machines coupled to a peripheral device. A USB controller core is coupled between the Universal Serial Bus port and the parallel bus port and converts data and commands between the Universal Serial Bus protocol and the parallel bus protocol. A sequencer is coupled between the USB controller core and the parallel bus port. A sequence of sequencer commands is loaded into memory in the USB bridge and used by the sequencer to perform a sequence of parallel port operations. The sequencer performs the commands autonomously without intervention from the USB host computer. Because the host computer does not have to initiate a USB transaction for each individual parallel port operation, the sequence of operations is completed in a shorter amount of time.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.