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Altera_Forum
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12 years ago

Cyclone V - JTAG ID Error - download failed

Hi, I meet JTAG error while downloading the .sof file to the FPGA via "Programmer". It says that the JTAG Id isn't what the Programmer was expecting for. I use Cyclone V devloppement kit...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
12 years ago

The USB-Blaster II on the Cyclone V board runs at 16MHz by default (unless you have a very old board in which case its default speed is set to 24MHz).

Does turning the speed down to 6MHz with the command below make things more reliable?

jtagconfig --setparam <cable id> JtagClock 6M

You can use --getparam to read the current speed.