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Altera_Forum
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13 years ago

Cyclone IV E JTAG issues - VCCA voltage level

Hi all, I have a custom board with Cyclone IV E (EP4CE115-F484). I am trying to access it via JTAG from Quartus, but keep receiving the "Error: Can't access JTAG chain". I check the Quar...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
13 years ago

Well, some success at last.

I cut the TDO track and inserted a tiniLogic buffer i there to lift the level of TDO to 2V5.

Now the JTAG works, the device configured and enters user mode normally.

I have a single LED active!

NEXT STEP:

get the EPCS16 programmed and booted from.