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General Category => Discussion - Hardware => Topic started by: Tycho on June 10, 2021, 12:12:10 PM

Title: FT232H SPI 30 MBaud wrong transmission
Post by: Tycho on June 10, 2021, 12:12:10 PM
Hi,

I'm getting wrong readout values if I increase the baud rate to 30 MBaud, see screenshots. I'm transmitting 0x1010 as MSB, CPOL=1, CPHA=0. At 5, 10 and 15 MBaud everything is ok, but at 30 MBaud, although the oscilloscope picture seems to be ok, there is a bit shift.

Are there any issues with FT232H SPI at high baud rates?

Thank you very much in advance!
Title: Re: FT232H SPI 30 MBaud wrong transmission
Post by: FTDI Community on June 11, 2021, 05:40:38 PM
Hello,

SPI modes 1 and 3 are not supported with our MPSSE engine.
If you require these modes, then you will need to consider FT4222H:

https://ftdichip.com/products/ft4222h/ (https://ftdichip.com/products/ft4222h/)

Best Regards,
FTDI Community