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

4.15 JTAG Emulation

The following sequence should be followed for proper functioning of JTAG:

  1. Power the board by connecting the Type-C USB connector with 5 V at 3A.
  2. Connect the micro-B USB cable for JTAG emulation into J20 once after powering the board (Hot Plug).

The AM243x LaunchPad includes the necessary circuitry for XDS110 emulation. The XDS110 class on-board emulation is used to support testing of software builds. The connection for the emulator uses a USB 2.0 micro-B connection (J20) and the circuit acts as a powered USB peripheral device. The VBUS power from the connector is used to power the emulation circuit such that the connection to the emulator is not lost when power to the LaunchPad is removed. Voltage translation buffers are used to isolate the XDS110 circuit from the rest of the LaunchPad.

An ESD protection diode (TPDE02B04DQAR) is provided on the USB signals to steer ESD current pulses to VCC or GND. The ESD protection diode protects against ESD pulses up to ±2.5 kV Human-Body Model (HBM) as specified in ANSI/ESDA/JEDEC JS-001 and provides ±12 kV contact discharge as well as ±15 kV air-gap discharge as specified in IEC 61000-4-2.

GUID-20210719-CA0I-SNWF-2M1H-CWKRHR6TM6XM-low.png Figure 4-26 JTAG Interface
GUID-20210719-CA0I-CN6D-G6BX-HGPP6Z3JQ3SC-low.png Figure 4-27 Micro-B USB Connection for JTAG