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Hard macros power routing issues

dbekiaris

Hello everybody,

 I import a design in SoC Encounter 7.1, where three hard macros (SRAMs) exist. The problem is that when I am trying to create the power stripes and connect them with the core rings to synthesize the power grid, the SRAM p/g pins cannot connect with the remaining power/ground network, although I have selected the proper metal layer from the .lef files of the macros. Is there anything possible to do for this? I tried also to align pins of the specified macros with the power/ground stripes, but it failed again. If it is possible, please help. Thank you very much in advance.

 

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  • dbekiaris
    Hi Kari and thanks for answering! Here is the picture of the open violations, demonstrating the hard macros (floorplan view). I also followed the advise of rotating some of the macros so that the pins are aligned, but nothing changed. What I have done is to create first of all the core ring (M6/M5 metal layers). I have choosen these because the metal layer for VDD/VSS of macros is M5. Also, the stripe metal layer is M5, while the standard cell special pins are of M1. After the core ring, I created 4 block rings, each for one macro. The rings I created are custom and they seem to be attached to the core ring. However, I can't see why these opens occur. I would be grateful if you could help/advise me on this problem. Thank you very much in advance. The picture follows. Kind Regards dbekiaris
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  • dbekiaris
    Hi Kari and thanks for answering! Here is the picture of the open violations, demonstrating the hard macros (floorplan view). I also followed the advise of rotating some of the macros so that the pins are aligned, but nothing changed. What I have done is to create first of all the core ring (M6/M5 metal layers). I have choosen these because the metal layer for VDD/VSS of macros is M5. Also, the stripe metal layer is M5, while the standard cell special pins are of M1. After the core ring, I created 4 block rings, each for one macro. The rings I created are custom and they seem to be attached to the core ring. However, I can't see why these opens occur. I would be grateful if you could help/advise me on this problem. Thank you very much in advance. The picture follows. Kind Regards dbekiaris
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