Apparatus and method for performing a multi-value polling...

Details Apparatus and method for performing a multi-value polling... Apparatus and method for performing a multi-value polling...

2004-10-15

2008-12-16

Kerveros, James C (Department: 2117)

Error detection/correction and fault detection/recovery

Pulse or data error handling

Digital logic testing

Reexamination Certificate

active

07467343

ABSTRACT:
In a test and debug environment using a JTAG protocol to test a target processing unit, apparatus for multi-value polling permits a poll unit, associated with the scan controller, to determine whether one of several possible signal groups is present in the received data stream. The test and debug unit generates a series of numbers, each number corresponding to a preselected signal groups. The corresponding field in the received data stream is decoded to provide a series of output signals, each output signal corresponding to one group. The output signals of the decoder are compared to corresponding numbers of the expected value. When a signal from the decoder unit is found to correspond to one of the selected data number, the poll operation is a success.

REFERENCES:
patent: 5144230 (1992-09-01), Katoozi et al.
patent: 6101622 (2000-08-01), Lesmeister
patent: 6182257 (2001-01-01), Gillingham
patent: 6314530 (2001-11-01), Mann
patent: 6721905 (2004-04-01), Ohwada
patent: 6779145 (2004-08-01), Edwards et al.
patent: 7360116 (2008-04-01), Nakamura

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