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Altera_Forum
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17 years ago

Stratix III. Problems with JTAG and Fast AS

Hello all! I have problems with Stratix III configaration on self-made PCB. We use Fast AS with EPCS64 and JTAG. Download cable: USB Blaster (not original ALTERA cable). 1. JTAG detec...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
17 years ago

Thank you for the clue... We've found one wrong pull-down. TCK was with 10 KOhm instead of 1 KOhm. But the problem remains. JTAG traces have 2-3 inches length. Design is very very simple. 2 LEDs are driven by constant high level. No other logic.

I suppose it's power and/or ground problem.