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FAQ: I cannot access JTAG TAP on Xilinx Spartan or SpartanXL scan after it is had been configured

Filed under FAQ / JTAG IEEE 1149.1

Q: I cannot access JTAG TAP on Xilinx Spartan or SpartanXL scan after it is had been configured

Answer:

Older devices of similar kind require an instantiation of the "BSCAN" symbol in your design in order to get access to the boundary scan circuitry after the configuration. Please see page 23 of Xilinx Datasheet DS060 for details.
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