> What about an 50Hz output pin? Is it doable to have FT2232D for booth, SPI
> and output pin?
There's no way to know/control how much time is spent between the
actual "execution" of two consecutive FTDI commands: clock jitter
comes from various sources: FTDI FIFOs, USB bus latency + async clock
delay (USB HW frames vs. USB stack), various software stacks, multi
tasking scheduling, etc.
If you need a precise clock, I think you should not rely on bit
banging mode at all.
libftdi - see http://www.intra2net.com/en/developer/libftdi for details.
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