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Altera_Forum
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11 years ago

Cyclone IV and M25P16 8 pins SPI Flash

Hello, I have a board with M25P16 8 pins SPI Flash on it. Now I want to program it with .jic in Active serial mode, for that I instantiated Altera Serial Flash Loader IP according to an37...
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Altera_Forum
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11 years ago

You can of course connect SPI flash to any I/O pins, but then it cannot be used for power-on configuration of the FPGA. Since you mention .jic programming, you are discussing power-on configuration, in which case, there is no "option" for which I/Os you connect the flash to - you *MUST* connect the SPI flash to the configuration pins.

The handbook for your device and the configuration guidelines tell you which pins your schematic should have used.

The .jic file FPGA download image already has those pins assigned, so if you have assigned the pins correctly, the .jic download should just work.

If you think you have things correct, but its not working, use a scope to check the SPI pins. I've debugged a design where the designer switched the serial data I/Os.

Cheers,

Dave