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AR# 43149

13.2 iMPACT - Specifying 12 MHz as Cable Frequency Results in "WARNING:iMPACT - Unsupported frequency. Using default frequency: 6 Mhz."


When I specify 12 MHz as my cable frequency, I see the following message in the iMPACT tool:

"WARNING:iMPACT - Unsupported frequency. Using default frequency: 6 Mhz."

Also, the cable speed seems to be reset to 2 MHz according to the log:

"// *** BATCH CMD : setCable -port usb21 -baud 2000000"

How do I work around this issue?


The cable will operate correctly at the lower frequency, so you can operate as normal or specify a different frequency. If you have a requirement to use 12 MHz, you can use iMPACT in batch mode.

To set the cable frequency in batch mode use the command:

setcable -port usb21 -baud 12000000

This issue will be resolved in a future version of the iMPACT tool.

Linked Answer Records

Master Answer Records

Answer Number Answer Title Version Found Version Resolved
40503 13.x iMPACT - Known Issues for the iMPACT 13.x Software N/A N/A
AR# 43149
Date 09/09/2013
Status Active
Type General Article
  • ISE Design Suite - 13.2
Boards & Kits
  • Platform Cable USB
  • Platform Cable USB-II