Serial data transceiver including elements which facilitate functional testing requiring access to only the serial data ports, and an associated test method
US6341142B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 16, 1997 |
| Grant date | Jan 22, 2002 |
| Priority date | — |
| Expiry date | Dec 16, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B3/46
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A serial data transceiver is presented which includes elements which facilitate testing using only the serial data transfer terminals of the transceiver. The serial data transceiver includes a transmitter and a receiver. The transmitter receives parallel data, converts the parallel data to a serial data stream, and transmits the serial data stream. The receiver receives a serial data stream, converts the serial data stream to parallel data, and provides the parallel data. During testing, parallel data produced by the receiver is routed to the transmitter input. In one embodiment, the transmitter includes a first router for routing parallel input data to the transmitter, and the receiver includes a second router for routing parallel output data produced by the receiver. The first router is coupled to the second router, both routers receive a test signal. When the test signal is asserted, the second router routes the parallel output data produced by the receiver to the first router, and the first router routes the parallel output data produced by the receiver to the transmitter. As a result, the received serial data is retransmitted by the transceiver. A test method involves assertin…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.