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Altera_Forum's avatar
Altera_Forum
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12 years ago

DATA0 pin in Cyclone IV E

I'm confused on the function of "DATA0" pin in EP4CE10.

On page 3 of "Cyclone IV Pin Connection Guidelines.pdf" from Altera, it says DATA0 pin is "a dedicated configuration data input pin".

So, if it's a dedicated configuration pin, it can not be used as user I/O. But, in other document, it seems this pin can be used as user i/o after configuration.

In my design, AS mode is used to configure FPGA from a SPI flash. After configuration, I want to use "DATA0" pin for other purpose.

Can I use this pin in my own logic?

"Cyclone IV Pin Connection Guidelines.pdf " is attached.

2 Replies

  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    12 years ago

    in your attached file,i found this description："After AS configuration, DATA0 is a dedicated input pin with optional user control."

    From what i understand,after AS configuration,DATA0 can only be used as input port.