Dynamically updating impedance compensation code for input and output drivers
US6624659B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 30, 2000 |
| Grant date | Sep 23, 2003 |
| Priority date | — |
| Expiry date | May 1, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K19/0005
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
In one embodiment of the invention, an update circuit having a bus driver to drive a bus dynamically receives an update compensation code. The bus driver receives data at a data clock signal. The update compensation code controls impedance matching at the bus driver according to the data. A code generator generates the update compensation code at a base clock signal. The base clock signal is synchronized with the data clock signal. The base clock signal has an update interval and a quiet interval. A distribution ring interface distributes the update compensation code to the update circuit synchronously with the base clock signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.