Set operating conditions for power estimation
Syntax
set_operating_conditions [‑voltage <args>] [‑grade <arg>] [‑process <arg>]
[‑junction_temp <arg>] [‑ambient_temp <arg>] [‑thetaja <arg>]
[‑thetasa <arg>] [‑airflow <arg>] [‑heatsink <arg>] [‑thetajb <arg>]
[‑board <arg>] [‑board_temp <arg>] [‑board_layers <arg>]
[‑design_power_budget <arg>] [‑supply_current_budget <args>] [‑quiet]
[‑verbose]Usage
| Name | Description |
|---|---|
[-voltage]
|
List of voltage pairs, e.g., {name value}. Supported voltage supplies vary by family. |
[-grade]
|
Temperature grade. Supported values vary by family. Default: commercial |
[-process]
|
Process data: typical or maximum Default: typical |
[-junction_temp]
|
Junction Temperature (C): auto|degC Default: auto |
[-ambient_temp]
|
Ambient Temperature (C): default|degC Default: default |
[-thetaja]
|
ThetaJA (C/W): auto|degC/W Default: auto |
[-thetasa]
|
ThetaSA (C/W): auto|degC/W Default: auto |
[-airflow]
|
Airflow (LFM): 0 to 750 Default: varies by family |
[-heatsink]
|
Dimensions of heatsink: none, low, medium, high, custom Default: medium |
[-thetajb]
|
ThetaJB (C/W): auto|degC/W Default: auto |
[-board]
|
Board type: jedec, small, medium, large, custom Default: medium |
[-board_temp]
|
Board Temperature degC |
[-board_layers]
|
Board layers: 4to7, 8to11, 12to15, 16+ Default: 8to11 |
[-design_power_budget]
|
Design Power Budget (W) Default: Unspecified |
[-supply_current_budget]
|
Sets list of supply current budget 'name value' pairs. Supported voltage supplies vary by family. |
[-quiet]
|
Ignore command errors |
[-verbose]
|
Suspend message limits during command execution |
Description
report_power command.
Operating conditions can be restored to their default values with the use of the reset_operating_conditions command.
Current operating conditions can be reported with the report_operating_conditions command.
Arguments
-voltage <arg> - (Optional) List of voltage supply names and their values specified in pairs. Supported voltage supply names and their values vary by family. For example if a family supports a voltage supply named Vccint, you can set the supply voltage to 0.8 with the following argument and value: -voltage {Vccint 0.8}
set_operating_conditions command can change the device speedgrade to match the specified voltage. This can have an affect on timing analysis. For UltraScale devices, when changing the Vccint voltage, the Vivado tool will automatically change the device to or from a low-voltage device as indicated by the voltage level specified.
-grade <arg> - (Optional) The temperature grade of the target device. Supported values vary by family. The default value is "commercial".
-process <arg> - (Optional) The manufacturing process characteristics to assume. Valid values are "typical" or "maximum". The default value is "typical".
-junction_temp <arg> - (Optional) The device junction temperature used for modeling. Valid values are "auto" or an actual temperature specified in degrees C. The default value is "auto".
-ambient_temp <arg> - (Optional) The environment ambient temperature in degrees C. The default setting is "default".
-thetaja <arg> - (Optional) The Theta-JA thermal resistance used for modeling in degrees C/W. The default setting is "auto".
-thetasa <arg> - (Optional) The Theta-SA thermal resistance used during modeling in degrees C/W. The default setting is "auto".
-airflow <[0:750]> - (Optional) Linear Feet Per Minute (LFM) airflow to be used for modeling. The default setting varies by device family.
-heatsink <arg> - (Optional) The heatsink profile to be used during modeling. Valid values are: none, low, medium, high, custom. The default setting is "medium".
-thetajb <arg> - (Optional) The Theta-JB thermal resistance used for modeling in degrees C/W. The default setting is "auto".
-board <arg> - (Optional) The board size to be used for modeling. The valid values are: jedec, small, medium, large, custom. The default value is "medium".
-board_temp <arg> - (Optional) The board temperature in degrees Centigrade to be used for modeling.
-board_layers <arg> - (Optional) The number of board layers to be used for modeling. Valid values are: "4to7" for boards with 4 to 7 layers, "8to11" for boards with 8 to 11 layers, "12to15" for boards with 12 to 15 layers, and "16+" for boards with 16 or more layers. The default setting is "12to15".
-design_power_budget <arg> - (Optional) The design power budget in Watts. This value is used by the report_power command to report the difference between the calculated on-chip power and the design power budget. When unspecified, the difference is not reported. The default is "unspecified".
-supply_current_budget <arg> - (Optional) List of voltage supply names and their current budget values specified in pairs. Supported voltage supply names vary by family. For example if a family supports a voltage supply named Vccint, you can set the supply current budget to 10 A with the following argument and value: -supply_current_budget {Vccint 10}
-quiet - (Optional) Execute the command quietly, returning no messages from the command. The command also returns TCL_OK regardless of any errors encountered during execution.
-verbose - (Optional) Temporarily override any message limits and return all messages from this command.
set_msg_config command.Examples
set_operating_conditions -grade industrial -ambient_temp 75set_operating_conditions -voltage {Vccaux 1.89}set_operating_conditions -process maximumset_operating_conditions -process maximum -voltage {Vccint 0.875}