SPRUJ10D May   2022  – September 2023

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Preface: Read This First
    1. 2.1 Sitara MCU+ Academy
    2. 2.2 If You Need Assistance
    3. 2.3 Important Usage Notes
  5. 2Kit Overview
    1. 3.1 Kit Contents
    2. 3.2 Key Features
    3. 3.3 Component Identification
    4. 3.4 BoosterPacks
    5. 3.5 Compliance
    6. 3.6 Security
  6. 3Board Setup
    1. 4.1 Power Requirements
      1. 4.1.1 Power Input Using USB Type-C Connector
      2. 4.1.2 Power Status LEDs
      3. 4.1.3 Power Tree
    2. 4.2 Push Buttons
    3. 4.3 Boot Mode Selection
  7. 4Hardware Description
    1. 5.1  Functional Block Diagram
    2. 5.2  GPIO Mapping
    3. 5.3  Reset
    4. 5.4  Clock
    5. 5.5  Memory Interface
      1. 5.5.1 QSPI
      2. 5.5.2 Board ID EEPROM
    6. 5.6  Ethernet Interface
      1. 5.6.1 Ethernet PHY #1 - CPSW RGMII/ICSSM
      2. 5.6.2 Ethernet PHY #2 - CPSW RGMII/ICSSM
      3. 5.6.3 LED Indication in RJ45 Connector
    7. 5.7  I2C
    8. 5.8  Industrial Application LEDs
    9. 5.9  SPI
    10. 5.10 UART
    11. 5.11 MCAN
    12. 5.12 FSI
    13. 5.13 JTAG
    14. 5.14 Test Automation Header
    15. 5.15 LIN
    16. 5.16 MMC
    17. 5.17 ADC and DAC
    18. 5.18 EQEP and SDFM
    19. 5.19 EPWM
    20. 5.20 BoosterPack Headers
    21. 5.21 Pinmux Mapping
  8. 5References
    1. 6.1 Reference Documents
    2. 6.2 Other TI Components Used in This Design
  9. 6Revision History

4.11 MCAN

The LaunchPad is equipped with a single MCAN Transceiver (TCAN1044VDRBTQ1) that is connected to the MCAN0 interface of the AM263x SoC. The MCAN Transceiver has two power inputs, VIO is the transceiver 3.3V system level shifting supply voltage and VCC is the transceiver 5 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.

GUID-20220502-SS0I-NHXS-7QXZ-FQ74DVRLG3GZ-low.png Figure 4-14 MCAN Transceiver and BoosterPack Header

The system has a 120Ω 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 standby control signal is an AM263x SoC GPIO signal. The STB control input has a pull up resistor that is used to have the transceiver be in low-power standby mode to prevent excessive system power. Below is a table that shows the operating modes of the MCAN transceiver based on the STB control input logic.

Table 4-10 MCAN Transceiver Operating Modes
STB Device Mode Driver Receiver RXD Pin
High Low current standby mode with bus wake-up Disabled Low-power receiver and bus monitor enable High (recessive) until valid WUP is received
Low Normal Mode Enabled Enabled Mirrors bus state

There is a separate MCAN1 interface that is not connected to a transceiver. MCAN1 is routed to the BoosterPack Header via a 2:1 Mux. The Mux selects whether ADC inputs or MCAN signals are mapped to the BoosterPack Header.

Table 4-11 MCAN BoosterPack Mux
GPIO63 Condition Function of Mux
LOW ADC Inputs Selected Port A ↔ Port B
HIGH MCAN TX/RX Selected Port A ↔ Port C