Yusuf =D6zkay ha scritto:
> I am doing simulation at proteus and i didn't connect pullups to the A an=
d B
> lines.I have connected pullup only to the RX pins. Is =FEt necessary at
> simulation?


Oh well, i don't know: but, without them, A and B will float and the =

receiver will get "spurious bytes" thus causing the RX errors...
-- =

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