| 摘要 |
A method and apparatus are provided for enabling a Joint Test Access Group (JTAG)-type EXTEST to be performed in an alternating current (AC)-coupled system in order to test one or more AC-coupled connections on a printed circuit board (PCB). Direct current (DC)-restore logic receives an AC-coupled signal that corresponds to an EXTEST test pattern output from a transmitting JTAG-compliant integrated circuit (IC), and converts the AC-coupled signal into a DC signal suitable for use by JTAG logic of a JTAG-compliant receiving IC.
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