SDAA515 August   2026 TDA4AL-Q1 , TDA4VE-Q1 , TDA4VL-Q1

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
  5. 2Detailed Description
    1. 2.1  DDR Inline ECC Overview
      1. 2.1.1 Benefits of DDR Inline ECC
    2. 2.2  ECC Protection Region Planning
    3. 2.3  ECC Capacity Considerations
    4. 2.4  ECC Configuration Guidelines
      1. 2.4.1 ECC Generation Phase
      2. 2.4.2 ECC Protection Phase
    5. 2.5  Why DDR Priming Is Required
    6. 2.6  DDR Priming Using DRU
    7. 2.7  DRU Resource Allocation
    8. 2.8  SBL Integration
    9. 2.9  Recommended Initialization Flow
    10. 2.10 Performance Evaluation
    11. 2.11 Troubleshooting Common DDR Inline ECC Deployment Issues
      1. 2.11.1 ECC Checking Enabled Before Priming
      2. 2.11.2 Incorrect ECC Region Configuration
      3. 2.11.3 Read-Modify-Write Disabled
    12. 2.12 Validation and Debug Considerations
  6. 3Summary
  7. 4References

2.9 Recommended Initialization Flow

Recommended TDA4VE DDR Inline ECC Deployment Flow Figure 2-3 Recommended TDA4VE DDR Inline ECC Deployment Flow

Figure 2-3 illustrates the recommended initialization sequence for deploying DDR Inline ECC on TDA4VE devices.

The recommended initialization flow consists of the following steps:

  1. Initialize the DDR subsystem.
  2. Configure ECC-protected memory regions.
  3. Enable ECC generation.
  4. Keep ECC checking disabled.
  5. Initialize DRU resources.
  6. Perform DDR priming across all ECC-protected memory regions.
  7. Verify completion of all DRU transfer operations.
  8. Enable ECC checking.
  9. Configure ESM reporting and system-level fault handling as required.
  10. Transfer control to the application software.

This sequence separates ECC information generation from runtime ECC validation. By verifying that valid ECC information exists throughout all protected memory regions before ECC checking is enabled, the system avoids false ECC fault reports during start-up and enters runtime operation with full SECDED protection enabled.