Simultaneous bidirectional port with synchronization circuit to synchronize the port with another port
US7222208B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 23, 2000 |
| Grant date | May 22, 2007 |
| Priority date | — |
| Expiry date | Sep 22, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F13/4077
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A simultaneous bidirectional port coupled to a bus includes a synchronization circuit that synchronizes the port with another simultaneous data port coupled to the same bus. The synchronization circuit includes an output driver having an imbalanced output impedance, and includes a receiver with input hysteresis. The input hysteresis of the receiver is not satisfied unless both drivers with imbalanced output impedance coupled to the bus assert an output signal. Each driver asserts a signal on the bus when initialization of the corresponding simultaneous bidirectional port is complete. When both simultaneous bidirectional ports are initialized, the hysteresis of the receivers is satisfied, and each port is notified that both have been initialized.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.