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Altera_Forum
Honored Contributor
Honored ContributorUsing Tri-state buffer on bus
Hello,
I have been using the tristate buffer (from primitives/buffer folder) to control a byte wide bus. I have noticed a number of warnings while compiling and was wondering if this feature was designed for a single line, or if it can handle larger bus lines? If not, what is the alternative for this case? Thanks. Andre3 Replies
Altera_ForumI have changed a few things and the warnings have disappeared. I guess I misinterpreted what was meant by the warnings. Thanks for your input.
- Altera_Forum
Since there is no physical tristate bus inside an FPGA the Quartus software has to generate a multiplexer logic that replaces the logical tristate bus. Maybe the warnings are caused by this multiplexer logic?
- Altera_Forum
I guess, you are talking of bidirectional buffer in schematic entry. It can also be used with busses, as many other elements too. I wouldn't expect that the warnings are related to connecing a bus to the buffer.
