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JSieg4's avatar
JSieg4
Icon for New Contributor rankNew Contributor
6 years ago

How to tri-state the configuration pins after configuration with CycloneV?

Hello, We work with a CycloneV in active serial configuration mode. The EPCS config flash is connected to the FPGA and also in parallel to an external microcontroller. The idea is to update the FPG...
ShafiqY_Intel's avatar
ShafiqY_Intel
Icon for Frequent Contributor rankFrequent Contributor
6 years ago

Hello JSieg4,

For Cyclone V device, only these pins can use as user I/O pin after configuration:

  • CLKUSR
  • DEV_OE
  • DEV_CLRn
  • DATA[15...5]

Below is example how I use DEV_OE pin as I/O pin after configuration.

Pin information for Cyclone V device I used:

Others Configuration pins (ie DCLK, nstatus, etc2), you cannot use it as I/O pin after configuration as this pins are dedicated pin.

I hope it is clear now.

Thanks