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ICC unconnected port.

时间:10-02 整理:3721RD 点击:
Hi, all
about the unconnected ports in the layout in ICC,
how could I check whether a input port is an unconnected port, or an un-driven port,since theinput to any cell couldnot be floating.
and do I need to tie the unconnected output port to a certain logic value, 1'b1, or 1'b0?
thanks in advance.
regards,
henry

for good habit , input pins should be tie to gnd if floating
output port can be floating ,
but it is nota must action ,
you must write scripts to query ,
like
foreach_in_coll var [get_flat_cells ]{
foreach_in_collvar2 [get_pins -of $var ] {
set nets [get_nets -of$var2-quiet ]
if XXXXXx

Thanks icfbicfb, could you plz provide the specific scripts to query the unconnected input ports?
thanks again

to find the connected nets , if the net does not exist orthe net is just one pin ( connections
pin ==1 ) , then this pin is floating ,

ICC有专门的一个option控制float pin的连接

是吧哪个?

thanks, and could you plz provide that specific option?

我有一年没有用ICC了。影响中以前看到过。你在command' pdf里面搜索,unconnect , float ,应该可以找到的

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