Exporting 1801 Power Model

You can export the power intent specified for the design to a 1801 power model file. To export power intent from a design,

1. Open the cellview in Power Manager.
2. Prepare the setup for automatic extraction.
3. Load the setup from the Power Manager toolbar/menu.
4. On the Power Manager toolbar/menu, click Extract from Design.
5. Use vpmExportPowerModel to export the 1801 Power Model information for a cellview.

In the 1801 power model, the power intent of the top design is only exported as the power intent information, with no sub-block power intent details. A power model is used to define the power intent of a hard IP cell. The command pair begin_power_model and end_power_model create a definitive boundary for the power intent for the hard IP cell. A model name is created, and it is targeted for a specific macro cell.

The interfaces of the hard IP power model include the top-level power domain for this IP cell and all the supplies of IP. This power domain is also used to specify the system power states at the hard IP level.

• An example of an exported 1801 power model file is shown below:

upf_version 2.1

##### Power Model Initialization (Section 1)##################################

begin_power_model top_model -for top

##### Supply Ports (Section 2)###################################################

create_supply_port VDD!  -direction inout

create_supply_port VDDA! -direction inout

create_supply_port VSS!  -direction inout

##### Supply Nets (Section 3)####################################################

create_supply_net VDD   -resolve parallel 

create_supply_net VDD1  -resolve parallel 

create_supply_net VDDA  -resolve parallel 

create_supply_net VDDSW -resolve parallel 

create_supply_net VSS   -resolve parallel 

create_supply_net VSS1  -resolve parallel 

connect_supply_net VDD    -ports { VDD }

connect_supply_net VDDA   -ports { VDDA }

connect_supply_net VDDSW  -ports { I3/I0/VDD }

connect_supply_net VSS    -ports { VSS }

##### Supply Sets (Section 4)####################################################

create_supply_set SS_VDDA_VSS      -function { power VDDA } -function { ground VSS }

create_supply_set SS_VDDSW_VSS     -function { power VDDSW } -function { ground VSS }

create_supply_set SS_VDD_VSS       -function { power VDD } -function { ground VSS }

##### Power Domains (Section 5)#################################################

create_power_domain PD_MACRO -elements {.}  \

-supply { primary SS_VDD_VSS } \

-supply { extra_supplies_0 SS_VDD+VDDSW_VSS } \

-supply { extra_supplies_1 SS_VDDA_VSS } \

-supply { extra_supplies_2 SS_VDDSW_VSS }

##### Port Attributes (Section 6)############################################

set_port_attributes  -port en_iso  -receiver_supply SS_VDD_VSS

set_port_attributes  -port in1  -receiver_supply SS_VDD_VSS

set_port_attributes  -port in2  -receiver_supply SS_VDD_VSS

set_port_attributes  -port in3  -receiver_supply SS_VDD_VSS

set_port_attributes  -port in4  -receiver_supply SS_VDD+VDDSW_VSS

set_port_attributes  -port out1  -driver_supply SS_VDD_VSS

set_port_attributes  -port out2  -driver_supply SS_VDD_VSS

set_port_attributes  -port out3  -driver_supply SS_VDD_VSS

set_port_attributes  -port out_iso  -driver_supply SS_VDD_VSS

set_port_attributes  -port out_psw  -driver_supply SS_VDD_VSS

set_port_attributes  -port outvdd  -driver_supply SS_VDD_VSS

set_port_attributes  -port psw_en  -receiver_supply SS_VDD_VSS

##### Power States (Section 7)###########################################

add_power_state SS_VDDA_VSS -supply \

                             -state { ON -simstate NORMAL \

                                  -supply_expr { power == { FULL_ON 1.300000 } && ground == { FULL_ON 0.000000 } }} \ 

                              -state { OFF -simstate CORRUPT \

                                  -supply_expr { power == OFF && ground == OFF }}

add_power_state SS_VDDSW_VSS -supply \

                             -state { ON -simstate NORMAL \

                                  -supply_expr { power == { FULL_ON 1.100000 } && ground == { FULL_ON 0.000000 } }} \ 

                              -state { OFF -simstate CORRUPT \

                                  -supply_expr { power == OFF && ground == OFF }}

add_power_state SS_VDD_VSS -supply \

                             -state { ON -simstate NORMAL \

                                  -supply_expr { power == { FULL_ON 1.100000 } && ground == { FULL_ON 0.000000 } }} \ 

                              -state { OFF -simstate CORRUPT \

                                  -supply_expr { power == OFF && ground == OFF }}

add_power_state PD_MACRO -domain  \

                             -state { S0 -logic_expr { SS_VDD_VSS == ON && SS_VDDSW_VSS == ON && SS_VDDA_VSS == ON }} \

                             -state { S1 -logic_expr { SS_VDD_VSS == ON && SS_VDDSW_VSS == ON && SS_VDDA_VSS == OFF }} \

                             -state { S2 -logic_expr { SS_VDD_VSS == ON && SS_VDDSW_VSS == OFF && SS_VDDA_VSS == ON }} \

                             -state { S3 -logic_expr { SS_VDD_VSS == ON && SS_VDDSW_VSS == OFF && SS_VDDA_VSS == OFF }}

##### Power Model End (Section 8)######################################

end_power_model

The following points explain the different sections of the exported 1801 power model:

• Section1: The begin_power_model command defines the boundary condition for the power model. This marks the beginning of the power model.
• Section2: The create_supply_port command defines a supply port in the scope of the power domain. These are created for all the top-level supply ports identified.
• Section3: The create_supply_net command creates a supply net in the scope of the power domain. These are created for all the top-level supply nets identified.
• Section4: The create_supply_set command creates the supply set name within the current scope. This section associates the interface supplies to the boundary supply ports or internally generated supplies.
• Section5: The create_power_domain command defines a power domain and the set of instances that are in the extent of the power domain. It may also specify whether the power domain can be partitioned further by subsequent commands.
• Section6: The set_port_attributes command specifies the information associated with data ports of instances. The attributes of this command identify a port’s related supplies (driver or receiver) and define the boundary of a power domain.
• Section7: The add_power_state command adds the state information to a supply port. If the voltage values are specified, the supply net state is FULL_ON and the voltage value is the single nominal value or within the range of min to max. If the supply net state is off, the voltage value is OFF.
• Section8: The end_power_model command defines the boundary condition for the power model. The power model ends here.

Related Topics

Setup for Automatic Extraction of Power Intent

vpmExportPowerModel

Registering Name-Based Supply Nets

Extracting the Power Intent from a Design

Creation of Power Domains

Exporting 1801 Design Model

Exporting Liberty Power Model

Special Isolation Cells in Liberty Power Model Export

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