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connecting a power pad to a macro pin

gops
In my design, there is an One time programmable Memory (OTP).It has 4 power supply pins, VDD, VSS,VPP. The connection of VDD and VSS is similar to the VDD and VSS of the standard cells.( I have connected them with global net connect and sroute) But for VPP , I have used dedicated core power pads(VDD core), but the problem is I cant connect these pads to the VPP pin > My requirement is I need to connect the VDDCORE (cell type) pad named PotpVPP(instance name) to VPP pin of the OTP named tsmc_13_nv_otp(cell type) with u_otp(instance name) .Is this possible using global net connect? In short how can i connect the VDD pin of a particular power pad ( PotpVPP) to the macro pin named VPP
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  • Hi,

    A globalNetConnect should make it. Use the "-override" switch as below in case you already assign a special net to the VDD pin of the power pad.

    1/ Create a VPP_net (or wahtever) power net  in the initFe.conf

    2/ Make sure the VPP pin of the Memory is defined as a POWER pin in the LEF.

    3/ globalNetConnect:

    globalNetConnect VPP_net   -type pgpin   -pin VPP   -singleInst  yourRamInstName   -override   -verbose

    globalNetConnect VPP_net   -type pgpin   -pin VDD   -singleInst  yourPowerPadInstName   -override   -verbose

     Stéphane.

     

Reply

  • Hi,

    A globalNetConnect should make it. Use the "-override" switch as below in case you already assign a special net to the VDD pin of the power pad.

    1/ Create a VPP_net (or wahtever) power net  in the initFe.conf

    2/ Make sure the VPP pin of the Memory is defined as a POWER pin in the LEF.

    3/ globalNetConnect:

    globalNetConnect VPP_net   -type pgpin   -pin VPP   -singleInst  yourRamInstName   -override   -verbose

    globalNetConnect VPP_net   -type pgpin   -pin VDD   -singleInst  yourPowerPadInstName   -override   -verbose

     Stéphane.

     

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