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
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