JTAG and boundary scan automatic chain selection
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United States of America Patent
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Mar 13, 2007
Grant Date -
N/A
app pub date -
Apr 29, 2003
filing date -
Apr 29, 2003
priority date (Note) -
In Force
status (Latency Note)
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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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