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Altera_Forum
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14 years ago

CONF_DONE in failed to go high jtag

With the Cyclone III starter board my USB-JTAG pod fails to configure the board. The error in the Quartus message window is: Error (209014): CONF_DONE pin failed to go high in device 1 The...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
14 years ago

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Thank you for your time and any advice you can give on this.

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Probe the JTAG pins with a scope. Make sure you use a short ground lead, eg., I'll often solder a loop of wire to a nearby capacitor ground and then loop that around the scope tip. Look at the signal integrity of the TCK pin first; look for ringing and a dip in its rising-edge (which can be caused by a transmission line reflection on that trace). Check the voltage high and low values of the signals. Compare those to the limits stated in the device handbook.

Cheers,

Dave