SPRUJ86A October   2023  – January 2024 AM263P4

 

  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 Device Information
      1. 1.3.1 HSEC 180-pin Control Card Docking Station
      2. 1.3.2 Security
  6. 2Hardware
    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
      4. 2.2.4 Power Sequence
      5. 2.2.5 PMIC
    3. 2.3  Functional Block Diagram
    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 Interfaces
      1. 2.11.1  Memory Interface
        1. 2.11.1.1 OSPI/QSPI
        2. 2.11.1.2 Board ID EEPROM
      2. 2.11.2  Ethernet Interface
        1. 2.11.2.1 Control Card Ethernet Routing
        2. 2.11.2.2 On Board Ethernet PHY
        3. 2.11.2.3 LED Indication in RJ45 Connector
      3. 2.11.3  I2C
      4. 2.11.4  Industrial Application LEDs
      5. 2.11.5  SPI
      6. 2.11.6  UART
      7. 2.11.7  MCAN
      8. 2.11.8  FSI
      9. 2.11.9  JTAG
      10. 2.11.10 Test Automation Header
      11. 2.11.11 LIN
      12. 2.11.12 MMC
      13. 2.11.13 ADC and DAC
    12. 2.12 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 E1 Board Modifications
      2.      5.1.B E2 Design Changes
  10. 6References
    1. 6.1 Reference Documents
    2. 6.2 Other TI Components Used in This Design
  11. 7Revision History

2.11.7 MCAN

The Control Card is equipped with a single MCAN transceiver (TCAN1024H-Q1) that is connected to the MCAN4 interface of the AM263Px SoC. The MCAN5 interface of the AM263Px SoC is mapped directly to the HSEC connector.

GUID-64C0FF47-440F-4A5B-A898-139342DFA7FD-low.png Figure 2-28 MCAN Transceiver

The MCAN transceiver has three power inputs, VIO is the transceiver I/O level shifting supply voltage and VCC is the transceiver 5 V supply voltage, and VSUP is the 12 V supply voltage. The SoC CAN data transmit data input is mapped to TXD of the transceiver and the CAN receive data output of the transceiver is mapped to the MCAN RX signal of the SoC with a series termination resistor close to the transceiver.

The standby control signal is a GPIO signal sourced from the IO expander. The STB control input is active high and a pull-down resistor is used to have the transceiver operate in normal mode as opposed to the standby mode that is default due to a weak internal pull up.

The system has a 120 Ω split termination on the CANH and CANL signals to improve EMI performance. Split termination improves the electromagnetic emissions behavior of the network by eliminating fluctuations in the bus common-mode voltages at the start and end of message transmissions.

The low and high level CAN bus input output lines are terminated to a three pin header.

The MCAN signals go through a 1:2 signal routing mux. There is a pull-down resistor on the select line of the mux and therefore the MCAN signal routing is the default.

Table 2-21 MCAN and FSI Mux
Select Condition Function
Low (default) MCAN signals selected A → B1
High FSI signals selected A → B2