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Altera_Forum's avatar
Altera_Forum
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11 years ago

USB Blaster II locks up after non-volatile key programming

Hi all, I am programming non-volatile design security key to Cyclone V using USB Blaster II. I am using Quartus 14.1 on Windows 7 64bit and USB Blaster II driver that comes with 14.1. I kn...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
10 years ago

Finally, update from Altera. They have found the root cause of the issue which is caused by the TCK frequency. The TCK is changed to 100khz when USB Blaster II is performing non-volatile key programming. After it is completed, the TCK is not reverted back to 24Mhz which causes the issue.

This will be fixed in Quartus 15.1. A temporary workaround is to manually change the TCK back to 6, 16 or 24 MHz. I've tested this with the following command:

jtagconfig.exe --setparam USB-BlasterII JtagClock 24M

And it seems to work OK.