SDAA123 January   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 ROM Loading Bootloader
  5. 2Secondary Program Loader
    1. 2.1 Normal Boot Flow
    2. 2.2 Falcon Boot Flow
  6. 3Secondary Boot Loader
    1. 3.1 Development Boot Flow
    2. 3.2 Optimized Boot Flow
    3. 3.3 Boot APP (Tertiary Bootloader)
  7. 4Summary
  8. 5References

4 Summary

This application note describes multiple boot flow options available on TDA4 and DRA8 devices using both SPL (Secondary Program Loader) and SBL (Secondary Boot Loader) bootloaders.

Each boot flow supports both legacy and combined boot modes, with combined mode enabling parallel loading of bootloader and system firmware for optimized ROM boot time. All flows support authentication on High Secure (HS) devices and can load firmware on multiple cores including MCU R5F, Main R5F, C7x, and A72.

These are a few of the boot options validated with the SDK. Customers can design with boot flow based on specific requirements and use cases.