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Altera_Forum
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18 years ago

Cyclone II programming problems

Hi all -- I've built a few PCBs based on Cyclone II FPGAs. Some of these boards, and especially the last, suffer from an annoying problem: When connecting the FPGA to the JTAG cable, Quart...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
18 years ago

Hi,

I'm able to solve (or maybe partially solve) the JTAG problem by enable the "Halt on-chip configuration controller" under Quartus II software. This option prevent AS reconfiguration loops from the blank series configuration device.

I wonder isn't that the main cause of the problem as if not mistaken, JTAG configuration takes precedence over other configurations.

Further more, my other 2 PCBs have not such symptom with that option turned off. And also, JTAG not working even with the absent of series configuration device, hence "Halt on-chip configuration controller" options should not applicable to it.

Regards,

Dennis