verilog Z value in expression

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Prasanna Kumar

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verilog z

is it illegal to use 'z' value in expression, in synthesis point of view?
and in any form inside a clocked always block?
 

z in verilog

Not entirely true ... U can synthesise 'casez ' to produce a priority mux structure . Z indicates undriven state so don't make any calculations based on these ..
 

verilog z value

if u have a Z state in mux it will not work.....
 

z verilog

Z should not be used in internal logic,

because internal tri state gate can increase chip's power consumption and

increase difficulty to DFT. Z only can be used on top IO ports.





Prasanna Kumar said:
is it illegal to use 'z' value in expression, in synthesis point of view?
and in any form inside a clocked always block?
Click to expand...
 

verillog equating z

Hi

What about U (Un-initialized) value of VHDL when converting to verilog.

I have some troubles with VHDL files with 'U' when converting to Verilog.

Does someone have a solution?

tnx
 

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