SPRUJ73 December   2023

 

  1.   1
  2.   Description
  3.   Features
  4.   4
  5. 1Evaluation Module Overview
    1. 1.1 Introduction
      1. 1.1.1 Read This First
        1. 1.1.1.1 Sitara MCU+ Academy
        2. 1.1.1.2 Important Usage Notes
    2. 1.2 Kit Contents
  6. 2Hardware Description
    1. 2.1 Component Identification
    2. 2.2 Power Requirements
      1. 2.2.1 Power Input Using USB Type-C Connector
      2. 2.2.2 Power Status LEDs
      3. 2.2.3 Power Tree
    3. 2.3 Functional Block Diagram
    4. 2.4 Header Information
    5. 2.5 Interfaces
      1. 2.5.1 ADC
      2. 2.5.2 LIN
      3. 2.5.3 MCAN
      4. 2.5.4 TRACE/GPMC Muxing Scheme
      5. 2.5.5 GPMC Memory Interface
        1. 2.5.5.1 PSRAM
        2. 2.5.5.2 GPMC Memory Footprint
        3. 2.5.5.3 NOR FLASH
      6. 2.5.6 TI 14-Pin Header
      7. 2.5.7 MIPI-60 Connector
    6. 2.6 HSEC Pinout
  7. 3Additional Information
    1. 3.1 If You Need Assistance
    2.     Trademarks
  8. 4References
    1. 4.1 Reference Documents
    2. 4.2 Other TI Components Used in This Design
  9. 5Revision History

2.5.2 LIN

The AM263x controlCARD Docking Station supports Local Interconnect Network communication through the use of a Dual LIN transceiver (TLIN2022A-Q1) that outputs the LIN Bus channels LIN1 and LIN3 of the AM263x SoC to the second pin of a pair of 3 pin headers.

GUID-20230111-SS0I-Q7GZ-F599-4DF0TRRQZKLK-low.png Figure 2-8 LIN Transceiver

The LIN transceiver has power input VSUP, the device supply voltage. The AM263x SoC LIN1 data transmit data input is mapped to TXD1 of the transceiver and the AM263x SoC LIN3 data transmit data input is mapped to TXD2 of the transceiver. The LIN receive data output of the transceiver RXD1 is mapped to the LIN1 RX signal of the AM263x SoC and the data output of the transceiver RXD2 is mapped to the LIN3 RX signal of the AM263x SoC. Both RXD1 and RXD2 nets have a series termination resistor close to the transceiver.

The AM263x SoC does not have an integrated pull up for the LIN RX signal and therefore an external pull up resistor is needed to the I/O supply voltage.

The AM263x controlCARD Docking Station includes a single pole double throw switch (S1) to control the voltage supply for the LIN Transceiver.

Table 2-12 LIN Switch Logic
LIN Voltage Switch Position (S1) Voltage Supply
Pin 1-2 VMAIN, 5V supply output from the USB-C connection
Pin 2-3 VBAT_LIN, external voltage supply from pin 1 of 2 pin header
There are also two single pole single throw switches (SW1, SW2) that drive the LIN Node application. SW1 controls LIN1, SW2 controls LIN3.

Table 2-13 LIN Node Application Switch
LIN Node Application Switch Position (SW1, SW2) LIN Node Application
Pin 1 Device node application
Pin 2 Controller node application
The AM263x controlCARD Docking Station pulls up the enable pin of each of the LIN transceiver channels for the transceiver to be in normal operational mode when the I/O Voltage supply is brought up.