AgentSkillsCN

power-analysis

精通RTL代码的质量检查与Lint工具的使用，能够严格遵循Lint规则，及时发现综合过程中的潜在问题，避免隐性锁存器的产生，并自动生成带有豁免说明的Lint报告。

SKILL.md
--- frontmatter
name: power-analysis
description: FPGA power estimation and optimization skill for low-power design
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Power Analysis Skill

Overview

Expert skill for FPGA power estimation and optimization, enabling low-power design through analysis and targeted optimization techniques.

Capabilities

  • •Run power estimation tools (Vivado Power Estimator)
  • •Analyze static and dynamic power
  • •Identify high-power consumption areas
  • •Apply clock gating and enable strategies
  • •Optimize switching activity
  • •Configure power domains
  • •Estimate power from simulation activity
  • •Generate power reports

Target Processes

  • •power-analysis-optimization.js
  • •synthesis-optimization.js
  • •clock-network-design.js

Usage Guidelines

Power Components

  • •Static Power: Leakage, always present when powered
  • •Dynamic Power: Switching activity, proportional to frequency
  • •I/O Power: External interface drivers
  • •Clock Network Power: Distribution network switching

Analysis Flow

  1. •Early estimation with Xilinx Power Estimator (XPE)
  2. •Post-synthesis power analysis
  3. •Simulation-based activity annotation (SAIF)
  4. •Post-implementation power analysis
  5. •Hardware measurement validation

Optimization Techniques

  • •Clock Gating: Disable clocks to unused logic
  • •Enable Gating: Use clock enables vs. clock gating
  • •Voltage Scaling: Use lower voltage when possible
  • •Frequency Scaling: Reduce clock where margin exists
  • •Logic Optimization: Minimize switching activity

Clock Enable Strategy

verilog
always_ff @(posedge clk)
  if (enable)
    data_reg <= data_in;

Activity Reduction

  • •Avoid unnecessary toggling
  • •Initialize registers to reduce X propagation
  • •Use Gray coding for counters
  • •Gate outputs of unused modules

Thermal Considerations

  • •Identify thermal hotspots
  • •Plan for cooling requirements
  • •Consider ambient temperature range
  • •Design thermal margin

Dependencies

  • •Power analysis tool integration
  • •Thermal analysis awareness
  • •Activity file generation (SAIF/VCD)