SPRUJ93 august   2023

 

  1.   1
  2.   Description
  3.   Features
  4.   4
  5. 1Evaluation Module Overview
    1.     Preface: Read This First
      1. 1.1.1 Sitara™ MCU+ Academy
      2. 1.1.2 If You Need Assistance
      3. 1.1.3 Important Usage Notes
    2. 1.1 Introduction
    3. 1.2 Kit Contents
    4. 1.3 Specification
    5. 1.4 Device Information
    6. 1.5 HSEC 180-pin Control Card Docking Station
    7. 1.6 Security
  6. 2Hardware
    1. 2.1  Functional Block Diagram
    2. 2.2  Component Identification
    3. 2.3  Power Requirements
      1. 2.3.1 Power Input Using USB Type-C Connector
      2. 2.3.2 Power Status LEDs
      3. 2.3.3 Power Tree
      4. 2.3.4 Power Sequence
      5. 2.3.5 PMIC
    4. 2.4  Reset
    5. 2.5  Clock
    6. 2.6  Boot Mode Selection
    7. 2.7  JTAG Path Selection
    8. 2.8  Header Information
    9. 2.9  GPIO Mapping
    10. 2.10 Push Buttons
    11. 2.11 Test Points
    12. 2.12 Interfaces
      1. 2.12.1  Memory Interface
        1. 2.12.1.1 QSPI
        2. 2.12.1.2 Board ID EEPROM
      2. 2.12.2  Ethernet Interface
        1. 2.12.2.1 RGMII
        2. 2.12.2.2 PRU-ICSS
        3. 2.12.2.3 LED Indication in RJ45 Connector
      3. 2.12.3  I2C
      4. 2.12.4  Industrial Application LEDs
      5. 2.12.5  SPI
      6. 2.12.6  UART
      7. 2.12.7  MCAN
      8. 2.12.8  FSI
      9. 2.12.9  JTAG
      10. 2.12.10 Test Automation Header
      11. 2.12.11 LIN
      12. 2.12.12 MMC
      13. 2.12.13 ADC and DAC
    13. 2.13 HSEC Pinout and Pinmux Mapping
  7. 3Software
    1. 3.1 SDK Installation
  8. 4Hardware Design Files
  9. 5Additional Information
    1. 5.1 Trademarks
    2. 5.2 E1 Design Hardware Modifications
  10. 6References
    1. 6.1 Reference Documents
    2. 6.2 Other TI Components Used in This Design

2.12.11 LIN

The AM263x 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.

GUID-20230515-SS0I-PPCW-CNTJ-KVRT1F4QL7BQ-low.png Figure 2-33 LIN PHY

The LIN transmit and receive signals are internally muxed on the AM263x 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 2-25 LIN MUX Select Logic
Select Logic Condition Function
LOW LIN Selected A→B1
HIGH HSEC UART Selected A→B2

The AM263x 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 AM263x Control Card includes a double pole single throw switch (SW10) to control the voltage supply for the LIN Transceiver.

Table 2-26 LIN Switch Logic
LIN Voltage Switch Position Voltage Supply Selected
Pin 1-2 VMAIN, 5 V 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 (SW9) that drives the LIN Node application.

Table 2-27 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.