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VROGE2's avatar
VROGE2
Icon for Occasional Contributor rankOccasional Contributor
6 years ago
Solved

DE10-Nano RS422

Can the DE10-Nano use RS422 protocol? I have checked the manufacturers website and it shows that to use RS422 protocol on the FT232R chip you need level converters and I am not sure that the level co...
  • ak6dn's avatar
    ak6dn
    6 years ago

    Short answer: no, not possible.

    Longer: the FT232R on the DE10-Nano is used to connect CMOS level pins (HPS_RX/TX) on the FPGA to the client side of the FT232R USB/Serial converter.

    The USB goes off board to connect to some host, and will look like a Serial USB port to it.

    There is no way to insert any kind of RS422 buffers (basically just differential high-speed serial signalling) in that signal path.

    If you wanted to do any kind of external RS422 signaling you'd have to dedicate some I/O pins on a connector, and build/attach a small board with RS422 buffers/connector.

ak6dn's avatar
ak6dn
Icon for Regular Contributor rankRegular Contributor
6 years ago

Short answer: no, not possible.

Longer: the FT232R on the DE10-Nano is used to connect CMOS level pins (HPS_RX/TX) on the FPGA to the client side of the FT232R USB/Serial converter.

The USB goes off board to connect to some host, and will look like a Serial USB port to it.

There is no way to insert any kind of RS422 buffers (basically just differential high-speed serial signalling) in that signal path.

If you wanted to do any kind of external RS422 signaling you'd have to dedicate some I/O pins on a connector, and build/attach a small board with RS422 buffers/connector.