TI Tools

USB DFU Bootloader Tool

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Getting Started

Upload bootloader images (tiboot3.bin) to TI K3 devices via USB boot mode. Follow these steps:

1. Set Boot Mode

Configure your device boot switches to USB boot mode (refer to your device user guide)

2. Connect Device

Connect via USB cable and power on the device

3. Upload Bootloader

Connect to device in browser, select binary file, and upload

Device Connection

No device connected

About This Tool

This tool allows you to upload bootloader images to Texas Instruments K3 processors via USB boot mode using the WebUSB API. When a K3 device is configured to boot from USB, it appears as a USB device that can receive firmware uploads directly from your browser.

Supported Devices

This tool supports TI K3 devices with USB boot capability:

  • AM62x series - AM625, AM623, AM621
  • AM64x series - AM6442, AM6441
  • AM65x series - AM6548, AM6546, AM6528, AM6526
  • J721E (Jacinto 7) - DRA829, TDA4VM
  • J7200
  • Other K3 devices with USB boot support

Browser Compatibility

This tool requires the WebUSB API, which is supported in:

  • Chrome 61+ (Windows, macOS, Linux)
  • Edge 79+ (Windows, macOS)

Not supported: Firefox and Safari do not currently support WebUSB.

How to Enter USB Boot Mode

To configure your device for USB boot mode:

  1. Power off your device
  2. Set the boot mode switches according to your device's user guide (typically specific switch positions for USB boot)
  3. Connect a USB cable between the device and your computer
  4. Power on the device
  5. The device should appear as a USB device in your system (VID:PID 0451:6165 for AM62x/AM64x)

Note: Boot switch configurations vary by device. Refer to your device's Evaluation Module User Guide for specific instructions.

Upload Process

This tool implements the USB DFU (Device Firmware Update) protocol to upload bootloader images:

  • tiboot3.bin - Initial bootloader (uses alternate interface 0: "bootloader")
  • After tiboot3.bin loads, the device will present new interfaces for tispl.bin and u-boot.img
  • Upload progress is shown in real-time with transfer speed and completion percentage
  • The device may reset automatically after successful upload

Expected behavior: After uploading tiboot3.bin, you should see the device reset and begin booting. Check your serial console for boot messages.

⚠️ Important Safety Information

  • Device Compatibility: Ensure you are uploading the correct bootloader for your specific device model
  • File Integrity: Only use official TI bootloader images or images you have built from verified sources
  • Power Stability: Do not disconnect the device or interrupt power during upload

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