SPRUJ12F August   2021  – January 2024 AM2431 , AM2432 , AM2434

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Preface: Read This First
    1. 1.1 If You Need Assistance
    2. 1.2 Important Usage Notes
  5. 2Kit Overview
    1. 2.1 Kit Contents
    2. 2.2 Key Features
    3. 2.3 Component Identification
    4. 2.4 BoosterPacks
    5. 2.5 Compliance
    6. 2.6 Security
  6. 3Board Setup
    1. 3.1 Power Requirements
      1. 3.1.1 Power Input Using USB Type-C Connector
      2. 3.1.2 Power Status LED's
      3. 3.1.3 Power Tree
      4. 3.1.4 Power Sequence
    2. 3.2 Push Buttons
    3. 3.3 Boot Mode Selection
  7. 4Hardware Description
    1. 4.1  Functional Block Diagram
    2. 4.2  BoosterPack Headers
      1. 4.2.1 Pinmux for BoosterPack
    3. 4.3  GPIO Mapping
    4. 4.4  Reset
    5. 4.5  Clock
    6. 4.6  Memory Interface
      1. 4.6.1 QSPI Interface
      2. 4.6.2 Board ID EEPROM
    7. 4.7  Ethernet Interface
      1. 4.7.1 Ethernet PHY Strapping
      2. 4.7.2 Ethernet PHY - Power, Clock, Reset, Interrupt
      3. 4.7.3 LED indication in Ethernet RJ45 Connector
    8. 4.8  USB 2.0 Interface
    9. 4.9  I2C Interface
    10. 4.10 Industrial Application LEDs
    11. 4.11 UART Interface
    12. 4.12 eQEP Interface
    13. 4.13 CAN Interface
    14. 4.14 FSI Interface
    15. 4.15 JTAG Emulation
    16. 4.16 Test Automation Interface
    17. 4.17 SPI Interface
  8. 5References
    1. 5.1 Reference Documents
    2. 5.2 Other TI Components Used in This Design
  9.   A E3 Design Changes
  10.   B Revision A Design Changes
  11.   Revision History

3.3 Boot Mode Selection

BOOTMODE[9:3] for the AM243x are selected by a DIP switch (SW4) or the test automation header. The remaining BOOTMODE[2:0] and BOOTMODE[12:10] are selected through the use of resistors. The test automation header uses an I2C IO expansion buffer to drive the bootmode when PORz is toggled. For more details about the test automation header, see Section 4.16. The supported boot modes are as follows:

  • QSPI
  • MMC - μSDCard (no direct support)
  • Universal asynchronous receiver/transmitter (UART)
  • USB-DFU
  • No-boot
Table 3-4 Boot-Mode Selection Table
Boot Modes Supported SW4.1 SW4.2 SW4.3 SW4.4 SW4.5 SW4.6 SW4.7
QSPI Flash 0 1 0 0 0 1 0
MMC1/SD Card 0 0 0 1 0 0 1
UART 1 1 1 0 0 0 0
USB -DFU 0 1 0 1 0 0 0
No Boot 1 1 1 1 0 0 0

GUID-20210718-CA0I-DMZ4-SF8J-C3WFJLBMMS6P-low.png Figure 3-7 Boot-Mode DIP Switch
Note: SW4.8 of the DIP switch remains unused.