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Altera_Forum's avatar
Altera_Forum
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16 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
16 years ago

As said, internal tristate in FPGA can be virtual only. At best, it is converted to multiplexers by the FPGA compiler. I didn't try, if the present code is accepted by Quartus, I've used internal tristate in connecting multiple entities by virtual busses only.

As a conclusion, internal tristate never saves resources. In my opinion, it doesn't serve a purpose in the present case.