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SE power connection wroute problem...

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jelydonut

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Im going nuts.. for some reason i cannot seem to get the IO power pads to connect to the power ring when routing.. however, when i perform a verify connection it tells me that VDD and VSS are not connected and selecting the IO pin shows the fly lines to the cells VDD and VSS pins..
If the tool knows they should be connected and arn't, then why isn't wroute connecting them?

any ideas would be appriciated

jelydonut
 

I too faced similar problems in Magma.Best way to solve is manually do the connections for the ones the tool is unable to do
 

    J

    jelydonut

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might be hockup pins are not connected between power pads & power rings.
 

Although the IO pads and power ring both might be defined to connect to power and ground, sometimes they are defined diffrently. e.g. check if pads have "VDD" and power ring has "VDD" on them (should not be "vdd" - lower case in either). If so, then change it to be consistent.

Here is how we handle it in Magma:

force plan net VDD $m -usage power -port VDD
force plan net VSS $m -usage ground -port VSS
force plan net VDD $m -usage power -port vdd
force plan net VSS $m -usage ground -port vss
force plan net VSS $m -usage ground -port GND


-Anupam
 

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