Intel® FPGA Power and Thermal Calculator User Guide

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ID 683445
Date 9/26/2022
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Document Table of Contents
Document Table of Contents x
1. Answers to Top FAQs 2. Overview of the Intel® FPGA Power and Thermal Calculator 3. Estimating Power Consumption with the Intel® FPGA Power and Thermal Calculator 4. Intel® FPGA Power and Thermal Calculator Graphical User Interface 5. Intel® FPGA Power and Thermal Calculator Pages 6. Factors Affecting the Accuracy of the Intel® FPGA PTC 7. Intel® FPGA Power and Thermal Calculator User Guide Archive 8. Document Revision History for the Intel® FPGA Power and Thermal Calculator User Guide A. Measuring Static Power
2. Overview of the Intel® FPGA Power and Thermal Calculator x
2.1. Accessing the Intel FPGA Power and Thermal Calculators 2.2. Intel® FPGA PTC Power Model Status 2.3. Definitions of Power Terms Used in this Document
3. Estimating Power Consumption with the Intel® FPGA Power and Thermal Calculator x
3.1. Estimating Power Before Starting the FPGA Design 3.2. Estimating Power While Creating the FPGA Design 3.3. Estimating Power After Completing the FPGA Design 3.4. Using Design Hierarchies in the Intel® FPGA Power and Thermal Calculator 3.5. Estimating Power for Dual-Core Devices
3.4. Using Design Hierarchies in the Intel® FPGA Power and Thermal Calculator x
3.4.1. Entering Hierarchy Information Into the Intel® FPGA PTC 3.4.2. Exporting, Importing, Duplicating, Renaming, and Deleting Hierarchies in the Intel® FPGA PTC
4. Intel® FPGA Power and Thermal Calculator Graphical User Interface x
4.1. Intel® FPGA PTC Select Family Dialog Box 4.2. Intel® FPGA PTC Primary GUI Components 4.3. Deleting Rows from Data Entry Pages
4.2. Intel® FPGA PTC Primary GUI Components x
4.2.1. Intel® FPGA PTC Data Entry Pages 4.2.2. Intel® FPGA PTC Module Manager 4.2.3. Intel® FPGA PTC Field Types 4.2.4. Intel® FPGA PTC Data Entry Error Messages
4.2.3. Intel® FPGA PTC Field Types x
4.2.3.1. Intel® FPGA PTC Input Field Dependencies
5. Intel® FPGA Power and Thermal Calculator Pages x
5.1. Intel® FPGA PTC - Power Summary 5.2. Intel® FPGA PTC - Common Page Elements 5.3. Intel® FPGA PTC - Main Page 5.4. Intel® FPGA PTC - Logic Page 5.5. Intel® FPGA PTC - RAM Page 5.6. Intel® FPGA PTC - DSP Page 5.7. Intel® FPGA PTC - Clock Page 5.8. Intel® FPGA PTC - PLL Page 5.9. Intel® FPGA PTC - I/O Page 5.10. Intel® FPGA PTC - I/O-IP Page 5.11. Intel® FPGA PTC - Transceiver Page 5.12. Intel® FPGA PTC - HPS Page 5.13. Intel® FPGA PTC - Crypto Page 5.14. Intel® FPGA PTC - HBM Page 5.15. Intel® FPGA PTC - Thermal Page 5.16. Intel® FPGA PTC - Report Page
5.3. Intel® FPGA PTC - Main Page x
5.3.1. Intel® FPGA PTC - Device Selection and Thermal Analysis Windows
5.11. Intel® FPGA PTC - Transceiver Page x
5.11.1. Estimating E-Tile Channel PLL Power with the Intel Power and Thermal Calculator
6. Factors Affecting the Accuracy of the Intel® FPGA PTC x
6.1. Toggle Rate 6.2. I/O Bank Allocation
1. Answers to Top FAQs
2. Overview of the Intel® FPGA Power and Thermal Calculator
3. Estimating Power Consumption with the Intel® FPGA Power and Thermal Calculator
4. Intel® FPGA Power and Thermal Calculator Graphical User Interface
5. Intel® FPGA Power and Thermal Calculator Pages
6. Factors Affecting the Accuracy of the Intel® FPGA PTC
7. Intel® FPGA Power and Thermal Calculator User Guide Archive
8. Document Revision History for the Intel® FPGA Power and Thermal Calculator User Guide
A. Measuring Static Power

5.6. Intel® FPGA PTC - DSP Page

Each row in the DSP data entry page of the Intel® FPGA Power and Thermal Calculator (PTC) represents a DSP design module where all instances have the same configuration, clock frequency, toggle percentage, and register usage.
Figure 23. DSP Page of the Intel® FPGA PTC


Table 11.  DSP Page Information
Column Heading Description
Module

Enter a name for the DSP module in this column. This is an optional value.

Full Hierarchy Name Specify the hierarchical path relevant to this entry. This is an optional entry. When entering levels of hierarchy, the pipe character (|) denotes a level of hierarchy.
Configuration Select the DSP block configuration for the module.
# of Instances

Enter the number of DSP block instances that have the same configuration, clock frequency, toggle percentage, and register usage. This value is not necessarily equal to the number of dedicated DSP blocks you use. For example, it is possible to use two 18 × 18 simple multipliers that are implemented in the same DSP block in the FPGA devices. In this case, the number of instances would be two.

To determine the maximum number of instances you can fit in the device for any particular mode, follow these steps:

  1. Open the “Variable Precision DSP Blocks” chapter of the appropriate device family handbook.
  2. In the “Number of DSP Blocks” table, take the maximum number of DSP blocks available in the device for the mode of operation.
  3. Divide the maximum number by the “# of Mults” for that mode of operation from the “DSP Block Operation Modes” table. The resulting value is the maximum number of instances supported by the device.
Clock Freq (MHz)

Enter the clock frequency for the module (in MHz). This value is limited by the maximum frequency specification for the device family.

Clock Enable % Specifies the percentage of time that the DSP block is enabled. ( Intel® Agilex™ devices only.)
Toggle %

Enter the average percentage of DSP data outputs toggling on each clock cycle. The toggle percentage ranges from 0 to 50%. The default value is 12.5%. For a more conservative power estimate, use a higher toggle percentage.

50% corresponds to a randomly changing signal, since half the time the signal holds the same value and thus not transition. This is considered the highest meaningful toggle rate for a DSP block.

Preadder? Select Yes if the PreAdder function of the DSP block is turned on.
Coefficient? Select Yes if the Coefficient function of the DSP block is turned on.
Registered Stages

Select number of the registered stages. Permitted values depend on the selected mode; some modes, such as floating-point multiply and accumulate cannot have 0 register stages..

  • 0—None
  • 1—Input
  • 2—Input and Output
  • 3—Input, Output, and Multiplier
  • 4— Input, Output, Multiplier, and Pipeline Stage 2
  • 5—Input, Output, Multiplier, Pipeline Stage 2, and Floating-Point Adder
Power (W) Routing

Indicates the power dissipation due to estimated routing (in W).

Routing power depends on placement and routing, which is a function of design complexity. The values shown represent the routing power estimate based on observed behavior across more than 100 real-world designs.

Block

Indicates the estimated power consumed by the DSP blocks (in W).

Total

Indicates the estimated power (in W), based on information entered into the Intel® FPGA PTC. It is the total power consumed by the DSP blocks and is equal to the routing power and block power.

User Comments Enter any comments. This is an optional entry.
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