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Level Shifter insertion in a single block PnR

nihanic

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Hi, I needed help with level shifter insertion strategy. I have a block-level design, which needs to have level shifter inserted in input-output ports during PnR. The synthesized netlist has no level shifter in it. This block has three supplies VDD (0.60V), VDDIN (0.80V) & VDDOUT (1.0V). All the elements of this block will be using VDD only except for level shifter, which will use VDDIN, VDDOUT and VDD. I mean (VDDIN, VDD) for input port level shifter supply and (VDD, VDDOUT) for output port level shifter supply. I will be implementing PnR in ICC2. How should I write the UPF for a block with a single power domain and have level shifter inserted in input-output ports? Can you please help?
 

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