Scan test circuit with reset control circuit

Details Scan test circuit with reset control circuit Scan test circuit with reset control circuit

2007-03-06

2007-03-06

Ton, David (Department: 2138)

Error detection/correction and fault detection/recovery

Pulse or data error handling

Digital logic testing

C714S729000

Reexamination Certificate

active

10674378

ABSTRACT:
A scan test circuit includes a scan flip-flop that receives a reset signal, a data signal, a scan data signal, and a scan shift enable signal selecting either the data signal or the scan data signal. A reset control circuit controls the reset signal according to the scan shift enable signal. Even if the reset signal originates in a combinatorial circuit, the reset control circuit can prevent the flip-flop from being reset during a scan shift sequence, without the need for external control of the reset signal. Further control of the reset signal can be provided by a mask circuit. These reset control features enable improved fault coverage to be obtained with a reduced number of external input terminals, a reduced number of test patterns, and only a small amount of additional test circuitry.

REFERENCES:
patent: 5815512 (1998-09-01), Osawa et al.
patent: 5911039 (1999-06-01), Hashizume et al.
patent: 5946247 (1999-08-01), Osawa et al.
patent: 5973529 (1999-10-01), Chappell et al.
patent: 6079039 (2000-06-01), Nakamura
patent: 6886124 (2005-04-01), Wang
patent: 59142481 (1984-08-01), None
patent: 2001196539 (2001-07-01), None
patent: 2001-296331 (2001-10-01), None
patent: 2002-267719 (2002-09-01), None

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