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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
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18 years ago

Hello Dennis,

thanks for mentioning the interesting option. I wasn't aware of it's existence, but also didn't experience yet similar problems. If the description given in the Quartus Handbook is correct, I wonder why the option has been almost hidden in options menu?

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halt on-chip configuration controller

Halts the on-chip auto-configuration controller of the FPGA device for AS configuration, or the configuration device for PS or Fast Passive Parallel (FPP) configuration to allow JTAG configuration through a download cable. If you want to configure your FPGA through JTAG

while the FPGA MSEL pins are set to AS mode, you should halt the on-chip configuration controller if any of the following occurs:

● the active serial configuration device connected to your FPGA is blank

● the active serial configuration device is not present

● an error occurs during AS configuration prior to JTAG configuration

quartus ii version 7.2 handbook

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Regards,

Frank