SPRADP6A February   2025  – May 2025 AM2612 , AM2631 , AM2631-Q1 , AM2632 , AM2632-Q1 , AM2634 , AM2634-Q1 , AM263P2 , AM263P2-Q1 , AM263P4 , AM263P4-Q1

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
  5. 2Power Net Checks
    1. 2.1 Verify Proper AM26x Power Rail Voltage Levels
    2. 2.2 Verify Maximum Current Loading
    3. 2.3 AM26x Power Sequencing
    4. 2.4 AM26x Power Topology References
  6. 3Device Boot Status
    1. 3.1 AM26x SOP Pin Status
    2. 3.2 SOP Boot Mode Latch Timing
    3. 3.3 AM26x SOP Pin Isolation
  7. 4Verify UART Output
    1. 4.1 Configure AM26x for UART Boot
    2. 4.2 Configure Host PC for UART Boot Validation
  8. 5Verify JTAG Connection
    1. 5.1 Configure AM26x for JTAG
    2. 5.2 Configure Host PC for JTAG Debug
    3. 5.3 Test the JTAG Connection
    4. 5.4 Connect to the AM26x R5F Core
  9. 6Loading and Executing a Code Example
    1. 6.1 Importing, Building, and Loading the Project
  10. 7Summary
  11. 8References
  12. 9Revision History

4.1 Configure AM26x for UART Boot

To check the AM26x UART output, the device must first be placed into UART boot mode.

If the PCB design accounts for a configurable boot mode (that is, through DIP switches), then set the SOP[3:0] switches to 0001. This SOP[3:0] setting for UART boot mode applies for all AM26x devices.

If the PCB design has a fixed boot mode configured by soldered pull resistors, then this is likely that the AM26x is set in a boot mode with UART Fallback. To confirm, see Section 3.1.

Once UART boot mode is set, connect the AM26x PCB system to a host PC using any USB to UART adapter. Make sure that the UART0 instance TX, RX pins are being used to connect to the host PC. TI recommends the XDS110 JTAG Debug Probe, which is supported for use by all AM26x microcontrollers, and is well integrated with the TI software and debug tools.