ROM patterns without assigned IO

[Brendan Simon]

Can ROM patterns be created internally (without the need for an allocated I/O pin)?

e.g. If I want to cycle through a pattern of bits (e.g. 8-bit value) to generate a PWM signal for sinusoid (or mixed sinusoids of different frequencies).  I just want 1 bit output.

Maybe I'm thinking about it wrongly, and just need a 1 bit pattern (pre-computed).

Similarly a state-machine, running through say 16 states, with 2 outputs.  Does it need 4 real I/Os allocated for the states or can they be internal?

[attila]

Hi @Brendan Simon

In newer software version the state output can be disabled, so the DIOs can be reused from StaticIO or Logic Analyzer.
With the WF SDK/API use DwfDigitalOutTypeState for internal loopback and DwfDigitalOutTypeROM for IO.