Honored ContributorHi,
Is is possible to program Cyclone IV E FPGA with USB BLASTER Rev. A cable? I am facing "JTAG chain Broken error" when trying to program a custom board using JTAG interface. I am able to successfully program EPCS configuration memory on the board with AS interface. Thanks
Honored ContributorYes that is possible. See this document: https://www.altera.com/content/dam/altera-www/global/en_us/pdfs/literature/hb/cyclone-iv/cyiv-51008.pdf
See figure 8 - 29. Also you will need to program using a .jic file. Use convert programming to create a jic file from your sof and hex (elf) files.Honored ContributorHonored ContributorThe Rev A should be OK with the Cyclone IV. It probably hadn't been released when the manual was written.
There is probably something wrong with the JTAG interface on your PCB.Honored ContributorYes, make sure your JTAG voltage is 2.5V (VCCA), and make sure your schematic and PCB layout matches the diagram.
Honored ContributorOK, then there might be some problem in my board, as even though I can upload configuration data to EPCS memory the FPGA doesn't configures itself and CONFIG_DONE pin
remains LOW after power-up ( while nSTATUS is High ). The voltage distribution on my board is as follows: VCCIO ( All Banks ) = 3.3V VCCA = 2.5V VCCINT = 1.2V So far I can only suspect some broken track on the board, as schematic and PCB layout are according to Fig 8-28.