Flexible I/O routing resources
US6826741B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 6, 2002 |
| Grant date | Nov 30, 2004 |
| Priority date | — |
| Expiry date | Nov 6, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K19/17744
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
In one aspect, flexible routing resources provided are comprising an arrangement of staggered line segments on a periphery of an electronic device. In another aspect, I/O bus lines a re coupled to receive signals from and to provide signals to other bus lines, core routing, and I/O circuitry, thus facilitating the use of the I/O bus for a variety of routes that may include I/O-to-core, core-to-I/O and core-to-core routes. In another aspect, a length of I/O bus lines is optimized for speed over long signal routes with high fanout. In another aspect, the loading effects of high fanout are minimized by using a plurality of tapping buffers to couple lines to both core routing and to I/O circuitry. In another aspect, a spiraling technique is provided that allows a continuous bus having line segments of consistent length whether or not the number of I/O blocks is an integral multiple of the selected logical length for line segments.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.