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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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Possibly its the pod? But it passed the jtag IDCODE tests...

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Depending on how they generate the IDCODE, you might have a problem with TMS or TDI. The IDCODE is loaded into the shift-DR register on TAP reset, i.e., TMS high and 6 TCK clocks. In that case, TMS does not get toggled. When the IDCODE is read out, TDI is a don't care, so that is also not tested.

How about trying to read the USERCODE? Or put the device into BYPASS mode, and then just shift a bit pattern through the JTAG chain.

Cheers,

Dave