Answers Database JTAG - Does data appear on TDO and DOUT during JTAG configuration of 4k/5k/Spartan families? Record #1279 Product Family: Hardware Product Line: 4000E Product Part: 4000E Problem Title: JTAG - Does data appear on TDO and DOUT during JTAG configuration of 4k/5k/Spartan families? Problem Description: Urgency: Standard General Description: Can you see the preamble on the DOUT pin or TDO pin during a Boundary Scan configuration of the 4k/5k/Spartan families? Solution 1: When configuring through the JTAG TAP, the preamble will appear on the DOUT pin. At the same time, the preamble appears on the TDO pin. End of Record #1279 - Last Modified: 01/26/00 15:13

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