Visible to Intel only — GUID: pxk1529616906296
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4.4.3. Configuring the FPGA over External Intel® FPGA Download Cable
The JTAG chain allows programming of both the Intel® Stratix® 10 TX FPGA and MAX V CPLD devices using an external Intel® FPGA Download Cable dongle or the on-board Intel® FPGA Download Cable II via the USB Interface Connector. During board bring-up, and as a back-up in case the on-board Intel® FPGA Download Cable II has a problem, the external Intel® FPGA Download Cable can be used to program both the Intel® Stratix® 10 and MAX® V CPLD via the Intel® FPGA Download Cable 2x5 pin 0.1" programming header (J8)
Another 2x5 pin 0.1" vertical non-shrouded header (J9) is provided on the board for programming the Intel® MAX® 10 FPGA for configuring the on-board Intel® FPGA Download Cable II circuitry. Once the on-board Intel® FPGA Download Cable II is configured and operational, the on-board Intel® FPGA Download Cable II can be used for subsequent programming of the Intel® Stratix® 10 TX FPGA and MAX® V CPLD.
- Switch closed/ON: Corresponding JTAG node is bypassed.
- Switch open/OFF: Corresponding JTAG node is enabled in the JTAG chain.
Pin 2 of the J8 Header is used to disable the embedded Intel® FPGA Download Cable II by connecting it to the embedded Intel® FPGA Download Cable II's low active disable pin with a pull-up resistor. Since Pin 2 from the mating Intel® FPGA Download Cable dongle is GND, when the dongle is connected into the JTAG header, the embedded Intel® FPGA Download Cable II is disabled to avoid contention with the external Intel® FPGA Download Cable dongle.