G - Physics – 01 – R
Patent
G - Physics
01
R
G01R 31/28 (2006.01) G01R 31/3177 (2006.01) G01R 31/3185 (2006.01)
Patent
CA 2135680
A plurality of individual systems (12 0-12n) are controlled during testing via a test value present on a four-wire Boundary-Scan port (17). To accomplish such control, the test value present at the Boundary-Scan port is shifted through at least one buffer (16A) which generates a control signal on its output lines (S0-S7) in accordance with the test value. The control signal from the buffer controls at least one multiplexer (18A) and demultiplexer (18A') that collectively operate to select one of the systems in accordance with the buffer control signal.
Un certain nombre de systèmes individuels (12 0-12n) sont commandés en cours d'essai au moyen d'une valeur d'essai présente sur un port de test périphérique quatre fils (17). € cette fin, la valeur d'essai présente sur le port de test périphérique traverse par décalage au moins un tampon (16A) qui génère un signal de commande sur ses lignes de sortie (S0-S7) en fonction de la valeur d'essai. Le signal de commande provenant du tampon commande au moins un multiplexeur (18A) et un démultiplexeur (18A') qui assurent conjointement la sélection d'un des systèmes conformément au signal de commande du tampon.
American Telephone And Telegraph Company
Kirby Eades Gale Baker
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