does V2p support tristate

[Matthew E Rosenthal]

Hi,
I am trying to create a large bus(32 bits wide), with many slaves
recieving and sending data.
Should I look for tristates on my V2pro or giant MUX or any other
suggestion anyone has?

Thanks

Matt

 

[John_H]

Consider that the Virtex-II Pro has a wide mux structure available to
implement 32 input multiplexers through "one" stage of logic using the
dedicated multiplexing elements up through MUXF8. If you have more than 32
inputs, you can go for more than one of these in series *or* use the Sum Of
Products logic outlined in the Virtex-II Pro Platform FPGA User Guide to
have the familiar-looking horizontal segmenting. I would only expect
someone to use the SOP logic for some extremely wide muxing since it may
take some hand-coding. Your synthesizer might even optimize this for you,
specified as a mux *or* tristates! Bottom line, you can go very wide and
have great access times.

"Matthew E Rosenthal" <mer2@andrew.cmu.edu> wrote in message
newsine.LNX.4.58-035.0403311916001.9835@unix45.andrew.cmu.edu...

Hi,
I am trying to create a large bus(32 bits wide), with many slaves
recieving and sending data.
Should I look for tristates on my V2pro or giant MUX or any other
suggestion anyone has?

Thanks

Matt