SDAA376 August   2026 DRA821U-Q1 , DRA829J-Q1 , DRA829V-Q1 , TDA4AH-Q1 , TDA4AL-Q1 , TDA4AP-Q1 , TDA4APE-Q1 , TDA4VE-Q1 , TDA4VH-Q1 , TDA4VL-Q1 , TDA4VM , TDA4VM-Q1 , TDA4VP-Q1 , TDA4VPE-Q1

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
    1. 1.1 Why Keywriter is Needed
    2. 1.2 What is Keywriter
  5. 2Keywriter Certificate Blob
    1. 2.1 Certificate Generation Overview
  6. 3Production Deployment Methods
    1. 3.1 OSPI Boot Method
    2. 3.2 eMMC Boot Method
    3. 3.3 eMMC Boot with DFU Backup Method
    4. 3.4 JTAG/Development Boot Method
    5. 3.5 RGMI Ethernet Boot Mode
  7. 4Updates in the Field
    1. 4.1 SWREV (Software Revision)
    2. 4.2 KEYREV (Key Revision)
  8. 5Common Debugging Steps
    1. 5.1 Dry-Run Testing
    2. 5.2 Package Requirements
    3. 5.3 eFuse Programming Setup
    4. 5.4 Verifying Programming Results
    5. 5.5 Boot Failure Troubleshooting
    6. 5.6 Trace Collection Without Wakeup UART
  9. 6Summary
  10. 7References

5.6 Trace Collection Without Wakeup UART

  • Use the trace buffer to capture TIFS traces if wakeup UART is unavailable on the device.