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

4.13 CAN Interface

The AM243x LaunchPad supports one CAN interface. MCAN0 signals are multiplexed with eQEP signals internally. These signals are connected to an on-board demultiplexer, whose select line is controlled by a GPIO from the SoC, to route the signal to either the MCAN transceiver or the eQEP header. Figure 4-21 depicts the implementation of the CAN interface using a CAN interface IC (TCAN1044VDRBRQ1). The TXD and RXD pins of the CAN interface IC are connected to the MCAN0_RX and MCAN0_TX pins of the AM243x, respectively. The STB pin can be directly driven by the AM243x to enable standby mode. When not directly driven by the AM243x, the 10kΩ pulldown resistor puts the CAN interface IC into normal operation mode. The output of signals for the CAN transceiver’s high and low are connected to the 3-pin header (J11).

GUID-20210719-CA0I-JGDG-3X0P-MZ705QC9H8CH-low.png Figure 4-21 CAN Interface
GUID-20210719-CA0I-FKBP-PFRB-K2S4LVF0MQNZ-low.png Figure 4-22 MCAN Transceiver and Header