Visible to Intel only — GUID: iga1438035523980
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5.4.5. FPGA Programming over External Intel® FPGA Download Cable
The JTAG chain header provides another method for configuring the FPGA using an external Intel® FPGA Download Cable device with the Intel® Quartus® Prime Programmer running on a PC. To prevent contention between the JTAG masters, the on-board Intel® FPGA Download Cable is automatically disabled when you connect an external Intel® FPGA Download Cable to the JTAG chain through the JTAG chain header.