SWRU622 August   2024 AWRL1432 , AWRL6432 , IWRL1432 , IWRL6432 , IWRL6432AOP

 

  1.   1
  2.   Trademarks
  3. 1Introduction
  4. 2Basic Bootloader Flow
    1. 2.1 Programming Serial Data Flash Over UART (Bootloader Service)
    2. 2.2 Binary File Format
    3. 2.3 Flash Programming Sequence
    4. 2.4 Supported UART Commands/Response and Format
    5. 2.5 Flashing Sequence
    6. 2.6 ROM-Assisted Image Download Sequence
    7. 2.7 Booting Application Image
      1. 2.7.1 Booting From Serial Flash
      2. 2.7.2 Bootmode – SPI
      3. 2.7.3 Bootmode - UART
  5. 3Secondary Bootloader
    1. 3.1 SBL Execution Flow
      1. 3.1.1 Flash Memory Partitioning for SBL Execution
      2. 3.1.2 SBL Feature Modifications
      3. 3.1.3 SBL Development Considerations
  6. 4Warm Reset
    1. 4.1 Integrity Verification
    2. 4.2 LSTC/PBIST
    3. 4.3 Watchdog Timer
    4. 4.4 Reset-Triggered Flash Reload of Application
      1. 4.4.1 Hardware Solutions
        1. 4.4.1.1 PMIC I2C Messaging
        2. 4.4.1.2 External Watchdog Timer
        3. 4.4.1.3 External Voltage Monitoring or Voltage Supervisors
      2. 4.4.2 Software Solutions
        1. 4.4.2.1 Setting Boot Vector to 0x0
  7. 5Relevant Registers
    1. 5.1 Reset Registers
    2. 5.2 PC Registers
      1. 5.2.1 Addresses

4.4.1.2 External Watchdog Timer

External watchdog timer can be used to monitor the mmWave radar device for detecting the software codes (Application code, driver code, and so forth) from entering the lockup state or increase in implementation time. The external watchdog timer can be serviced from the GPIO's of the mmWave radar device. If the external watchdog timer is not serviced regularly as expected then the timer can trigger the NRESET signal to the device. On reset from external watchdog timer, mmWave radar device would provide a clean restart of the device and reload the flash contents from FLASH memory. One of the examples for the external watchdog timer is TPS3430 - Automotive Window Watchdog Timer with Programmable Reset Delay. The watchdog timer can also be used to detect and recover from a hardware fault.