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Altera_Forum
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10 years ago

Cyclone IV configuration - nCONFIG signal and JTAG programming issue

Hi, I have a custom board for EP4CE22E22 Cyclone IV FPGA. I have configured the board for JTAG only mode and using USB Blaster Rev.B for programming. The problem I am facing is that JTAG Scan f...
Altera_Forum's avatar
Altera_Forum
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10 years ago

The rev B cable was updated to rev C to overcome this issue. The change was to move to a flex-rigid cable - the electronics in the USB-Blaster are unchanged.

So, you can get yourself a rev C cable and you'll be away. Alternatively, I suggest you shorten the ribbon cable on your rev B and you'll be happier, since won't have forked out for a new cable. I have several rev B cables all working happily with the new parts. See attached pic. Note - you don't need to go nearly as short as this!

Cheers,

Alex