JTAG and boundary scan automatic chain selection

Details JTAG and boundary scan automatic chain selection JTAG and boundary scan automatic chain selection

2007-03-13

2007-03-13

Myers, Paul R. (Department: 2112)

Electrical computers and digital data processing systems: input/

Intrasystem connection

System configuring

C714S030000, C714S724000, C714S727000, C714S729000

Reexamination Certificate

active

10425388

ABSTRACT:
A printed circuit board (PCB) may be used in a first mode where boundary scan techniques are used to externally program and/or test devices on the PCB, or a second mode where an internal source programs devices using boundary scan techniques. In one implementation, there is also additional flexibility to include or skip devices in a boundary scan chain and to accommodate non-scan related functions for pins used for scanning. These various modes of operation may be selected by activating and deactivating buffers.

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Agilent Technologies; “Boundar Scan Theory Overview”; Dynamic Details Incorporated; Apr. 3, 2001; all pages.

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