Method and apparatus for testing serial connections

Details Method and apparatus for testing serial connections Method and apparatus for testing serial connections

2006-05-30

2006-05-30

Ha, Dac V. (Department: 2634)

Pulse or digital communications

Transceivers

C375S358000, C370S503000

Reexamination Certificate

active

07054356

ABSTRACT:
A method and apparatus for testing a serial connection is presented. A serial data stream is transmitted from a sending device to a receiving device. The serial data stream is generated using sending device timing information and input data. A receiver in the receiving device recovers both the timing information and the input data and then inputs them back into a transmitter located in the receiving device. The transmitter in the receiving device then generates a second serial data stream based on the recovered input data and the sending device timing information. A receiver in the sending device receives the second serial data stream and outputs the sending device timing information and input data to a FIFO buffer, for alignment of the input data. Since the input data and timing information are generated based on a sending device timing information, the FIFO can provide a signal for testing by performing phase alignment on the data. There is no need to re-synchronize the data in the sending device. Using the sending device timing information to generate and test information in the sending device, removes the need to test data using a FIFO in the receiving device and reduces the complexity and processing requirements of the FIFO in the sending device.

REFERENCES:
patent: 5448598 (1995-09-01), Yousefi et al.
patent: 5787114 (1998-07-01), Ramamurthy et al.
patent: 6331999 (2001-12-01), Ducaroir et al.
patent: 6771694 (2004-08-01), Baumgartner

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