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Author Topic: FT231X and Synchronous Bit Bang  (Read 3820 times)


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FT231X and Synchronous Bit Bang
« on: April 02, 2021, 10:33:10 AM »

Good morning,
we are using an FT231X, unfortunately, I have problems using the SetBitMode, the mode 0x4 = Synchronous Bit Bang, does not work with the _NET.dll library.

Thanks for the help


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Re: FT231X and Synchronous Bit Bang
« Reply #1 on: April 02, 2021, 04:25:38 PM »


Which version of the .net library are you using? The latest can be found here:


Can you please confirm why you believe the function is not working?

What is the return code after calling the function?

Please note that other function GetBitMode does not actually get the bit mode.
It actually returns the pin state of the I/O pins (used in bit bang mode).
This can be deceiving with the function name.

Please refer to AN_373 Bit-Bang Modes for the FT-X Series which should help you.

Best Regards,
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