Excavating
Patent
1994-03-11
1995-08-08
Voeltz, Emanuel T.
Excavating
371 221, 371 225, 371 226, G06F 1100
Patent
active
054405670
ABSTRACT:
A complementary boundary-scan cell arrangement includes a plurality of system input terminals supplied with signals from the system side, a corresponding number of scan input terminals, a corresponding number of registers supplied with signals inputted to the system input terminals or the scan input terminals and adapted for holding them, a corresponding number of system output terminals supplied with the signals held by the registers and adapted for outputting them to the system side, and a corresponding number of scan output terminals supplied with the signals held by the registers and adapted for outputting them for scan. This complementary boundary-scan cell arrangement further includes a corresponding number of first to fourth multiplexers. The first and second multiplexers to permit switching the connection relationships between the respective input terminals and the registers. The third and fourth multiplexers to permit switching the connection relationships between the registers and the respective output terminals.
REFERENCES:
patent: 5150044 (1992-09-01), Hashizume et al.
patent: 5270642 (1993-12-01), Parker
patent: 5281864 (1994-01-01), Hahn et al.
patent: 5343478 (1994-08-01), James et al.
IEEE Std. 1149.1-1990, pp. 1-1 to 1-5, May 21, 1990, "IEEE Standard Test Access Port and Boundary-Scan Architecture".
Assouad Patrick J.
Kabushiki Kaisha Toshiba
Voeltz Emanuel T.
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