"Set_port_attribute" in IEEE 1801-2015 in this command are defined as follows, not all tools support all of the option:
This command is used to describe the power connection port "unknown" region, such as top INPUT port of which is a driving voltage domain by cell, which cell voltage domain of the output port Output of the drive; as hard macro INPUT port of the actual which cell voltage domain of hard macro internal drive, output port which in turn drives the cell voltage domain by internal hard macro; based on these demands, this command usually has the following three scenarios:
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Power Specifies the top port attributes, as defined as the top shut down power domain, but some need to be defined as always on port, the isolation control signal at this time need to specify the properties of these set_port_attribute port, the port with respect to INPUT - driver_supply specified supply set driver, for the output port with the specified supply set receiver -receiver_supply.
set_port_attributes -ports {my_top_input} -driver_supply {PD2_set}
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Macro specified attributes of power, as specified in the power Macro Model attribute in each power port, with the port Top contrary, to supply set Output port specified by the macro driver -driver_supply, for the INPUT port specified by macro receiver -receiver_supply the supply set.
set_port_attributes -port {my_macro_input} -receiver_supply ss_SW
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Hard macro specify a certain output is input to a feedthrough, such as a bump pad input to the output of the feedthrough is required to specify a -feedtrhough.
set_port_attribute -model BUMP_PAD -feedthrough -ports {in out}