IO Rings are established through IO Cell abutment and through IO Filler Cells

Io rings are established through io cell abutment and

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IO Rings are established through IO Cell abutment and through IO Filler Cells Power Trunks are constructed between Core Power Ring and Power Pads Trunk is a piece of metal that connects IO Pad and Core Ring Technical information required for Power Planning: Total Dynamic Power info. will get from Compiler Technology File will provide Current Density (J MAX ) LEF will prove the Metal Layer width Technology Library will provide Core Voltage 26 SmartPlay Confidential ASIC Physical Design
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Power planning Levels of Power Distribution Rings V DD and V SS Rings are formed around the Core and Macro Stripes Carries V DD and V SS around the chip Carries V DD and V SS from Rings across the chip Power Stripes are created in the Core Area to tap power from Core Rings to the core area Rails (Special Route) Connect V DD and V SS to the standard cell Standard Cell Rails are created to tap power from Power Stripes to Std. Cell Power/Ground Pins Power Vias Insert all Power Vias between Ring & Grid, Grid & Rail and Vertical Grid & Horizontal Grid Trunks Connects Ring to Power Pad 27 SmartPlay Confidential ASIC Physical Design
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Power planning 28 SmartPlay Confidential ASIC Physical Design Courtesy: asic-soc.blogspot.in Power Plan: Calculations Total Dynamic Core Current = 𝐓𝐓𝐓𝐓𝐓𝐓𝐓𝐓𝐓𝐓 𝐃𝐃𝐃𝐃𝐒𝐒𝐓𝐓𝐃𝐃𝐇𝐇𝐌𝐌 𝐂𝐂𝐓𝐓𝐒𝐒𝐂𝐂 𝐏𝐏𝐓𝐓𝐏𝐏𝐂𝐂𝐒𝐒 𝐂𝐂𝐓𝐓𝐒𝐒𝐂𝐂 𝐕𝐕𝐓𝐓𝐓𝐓𝐓𝐓𝐓𝐓𝐑𝐑𝐂𝐂 Pad to Core Trunk Width = 𝐓𝐓𝐓𝐓𝐓𝐓𝐓𝐓𝐓𝐓 𝐃𝐃𝐃𝐃𝐒𝐒𝐓𝐓𝐃𝐃𝐇𝐇𝐌𝐌 𝐂𝐂𝐓𝐓𝐒𝐒𝐂𝐂 𝐂𝐂𝐑𝐑𝐒𝐒𝐒𝐒𝐂𝐂𝐒𝐒𝐓𝐓 𝐍𝐍𝐓𝐓 . 𝐓𝐓𝐨𝐨 𝐑𝐑𝐇𝐇𝐒𝐒𝐂𝐂𝐑𝐑 𝐌𝐌 𝐉𝐉𝐌𝐌𝐀𝐀𝐉𝐉 𝐌𝐌 𝐂𝐂𝐑𝐑𝐒𝐒𝐒𝐒𝐂𝐂𝐒𝐒𝐓𝐓 𝐒𝐒𝐓𝐓𝐑𝐑𝐒𝐒𝐌𝐌𝐂𝐂𝐑𝐑 𝐩𝐩𝐂𝐂𝐒𝐒 𝐑𝐑𝐇𝐇𝐒𝐒𝐂𝐂 Core Ring Width = 𝐓𝐓𝐓𝐓𝐓𝐓𝐓𝐓𝐓𝐓 𝐃𝐃𝐃𝐃𝐒𝐒𝐓𝐓𝐃𝐃𝐇𝐇𝐌𝐌 𝐂𝐂𝐓𝐓𝐒𝐒𝐂𝐂 𝐂𝐂𝐑𝐑𝐒𝐒𝐒𝐒𝐂𝐂𝐒𝐒𝐓𝐓 𝟐𝟐 𝐌𝐌 𝐍𝐍𝐓𝐓 . 𝐓𝐓𝐨𝐨 𝐑𝐑𝐇𝐇𝐒𝐒𝐂𝐂𝐑𝐑 𝐌𝐌 𝐉𝐉𝐌𝐌𝐀𝐀𝐉𝐉 𝐓𝐓𝐨𝐨 𝐓𝐓𝐓𝐓𝐂𝐂 𝐌𝐌𝐂𝐂𝐓𝐓𝐓𝐓𝐓𝐓 𝐋𝐋𝐓𝐓𝐃𝐃𝐂𝐂𝐒𝐒 𝐨𝐨𝐓𝐓𝐒𝐒 𝐑𝐑𝐇𝐇𝐒𝐒𝐑𝐑 𝐌𝐌 𝐂𝐂𝐑𝐑𝐒𝐒𝐒𝐒𝐂𝐂𝐒𝐒𝐓𝐓 𝐒𝐒𝐓𝐓𝐑𝐑𝐒𝐒𝐌𝐌𝐂𝐂𝐑𝐑 𝐩𝐩𝐂𝐂𝐒𝐒 𝐑𝐑𝐇𝐇𝐒𝐒𝐂𝐂 Power Stripes Spacing = 𝐂𝐂𝐓𝐓𝐒𝐒𝐂𝐂 𝐖𝐖𝐇𝐇𝐒𝐒𝐓𝐓𝐓𝐓 ( 𝐍𝐍𝐓𝐓 . 𝐓𝐓𝐨𝐨
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