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Altera_Forum's avatar
Altera_Forum
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17 years ago

implementing a mux using high impedances

I have many streaming input ports that I want to connect to a single streaming output port. Rather than using a VHDL case or lengthy ifels statement, I was wondering if I could get tricky with...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
17 years ago

Did you try with quartus first.

I have doubts. Remember there is only a tristate buffer at output pins and nothing internal. Any internal Z logic is done in muxes.

you are first inferring registers applying Z(datain0_d,datain1_d...etc) then you connect all register outputs to one pin. This is not compatible with io structure I believe.