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Altera_Forum
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15 years ago

Cyclone III programming problem (JTAG and AS)

Hello All, Please help! We have a problem with Cyclone III devices programming. We are using the board with 5 Cyclone III devices, connected in Combining JTAG and Serial (ESPC64) configuration. Fi...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

Thanks for replay, FvM.

Actual MSEL configurations are Active Parallel (3.3V) for Master and Fast Passive Parallel Fast (3.3V) for next 4 slaves. Which was good for previous revision with parallel configuration. JTAG is configured in chain, as I mention before, Figure 9-26 in Chapter 9, Cyclone III Device Handbook, Vol 1. And, it sims to be JTAG is working. Autodetect in programmer showing a correct configuration and I'm able to configure the serial configuration device (EPCS64) by JTAG, as well as by AS Interface.

The board is high density 16 layers board, as well as very expencive and I would like to debug other circuits on the board before next revision, what I can't do without programmed FPGAs. So, I will really appresiate for any help and ready to submit any information which can help.