SPRUJG3 March   2025

 

  1.   1
  2.   Description
  3.   Features
  4.   4
  5. 1Evaluation Module Overview
    1. 1.1 Introduction
      1.      Preface: Read This First
        1. 1.1.1.1 Sitara MCU+ Academy
        2. 1.1.1.2 Important Usage Notes
    2. 1.2 Kit Contents
    3. 1.3 Specification
      1. 1.3.1 Component Identification
    4. 1.4 Device Information
      1. 1.4.1 HSEC 180-pin Control Card Docking Station
      2. 1.4.2 Security
  6. 2Hardware
    1. 2.1  Power Requirements
      1. 2.1.1 Power Input Using USB Type-C Connector
      2. 2.1.2 Power Status LEDs
      3. 2.1.3 Power Tree
      4. 2.1.4 Power Sequence
      5. 2.1.5 PMIC
    2. 2.2  Functional Block Diagram
    3. 2.3  Reset
    4. 2.4  Clock
    5. 2.5  Boot Mode Selection
    6. 2.6  JTAG Path Selection
    7. 2.7  Header Information
    8. 2.8  GPIO Mapping
    9. 2.9  Push Buttons
    10. 2.10 Interfaces
      1. 2.10.1  Memory Interface
        1. 2.10.1.1 OSPI
        2. 2.10.1.2 Board ID EEPROM
      2. 2.10.2  Ethernet Interface
        1. 2.10.2.1 Control Card Ethernet Routing
        2. 2.10.2.2 On Board Ethernet PHY
        3. 2.10.2.3 LED Indication in RJ45 Connector
        4. 2.10.2.4 Ethernet Add On Board Connector
      3. 2.10.3  I2C
      4. 2.10.4  Industrial Application LEDs
      5. 2.10.5  SPI
      6. 2.10.6  UART
      7. 2.10.7  MCAN
      8. 2.10.8  FSI
      9. 2.10.9  JTAG
      10. 2.10.10 Test Automation Header
      11. 2.10.11 LIN
      12. 2.10.12 MMC
      13. 2.10.13 ADC and DAC
    11. 2.11 HSEC Pinout and Pinmux Mapping
  7. 3Hardware Design Files
  8. 4Additional Information
    1. 4.1 If You Need Assistance
    2. 4.2 Trademarks
  9. 5Related Documentation
    1. 5.1 Supplemental Content
      1.      5.1.A E2 Design Changes
      2.      5.1.B A Design Changes
  10. 6References
    1. 6.1 Reference Documents
    2. 6.2 Other TI Components Used in This Design
  11. 7Revision History

2.10.11 LIN

The AM263Px Control Card supports Local Interconnect Network communication through the use of a LIN transceiver (TLIN2029-Q1) that outputs the LIN Bus to the second pin of a 3 pin header.

TMDSCNCD263P-SIP LIN PHY Figure 2-31 LIN PHY

The LIN transmit and receive signals are internally muxed on the AM263Px with the UART1 transmit and receive signals. Because of the internal muxing, there is an external 1:2 mux (SN74CB3Q3257PWR) which has a select line that is driven by the GPIO Expander.

Table 2-24 LIN MUX Select Logic
Select Logic Condition Function
LOW LIN Selected A→B1
HIGH HSEC UART Selected A→B2

The AM263Px SoC does not have an integrated pull up for the LIN RX signal, therefore, an external pull up resistor is needed to the processor I/O supply voltage is required.

The AM263Px Control Card includes a double pole single throw switch (SW4) to control the voltage supply for the LIN Transceiver.

Table 2-25 LIN Switch Logic
LIN Voltage Switch Position Voltage Supply Selected
Pin 1-2 VMAIN, 5V supply output from either the USB-C connection or HSEC power connection.
Pin 2-3 VBAT_LIN, external voltage supply from pin 1 of 2 pin header

There is also a single pole throw switch (SW5) that drives the LIN Node application.

Table 2-26 LIN Node Application Switch
LIN Node Application Switch Position LIN Node Application
Pin 1 Device node application
Pin 2 Controller node application

The Control Card pulls up the enable pin of the LIN transceiver for the transceiver to be in normal operational mode when the I/O Voltage supply is brought up.