SPRUJ63A September   2022  – October 2023

 

  1.   1
  2.   Trademarks
  3. 1Introduction
    1. 1.1 EVM Revisions and Assembly Variants
    2. 1.2 Inside the Box
  4. 2Important Usage Notes
    1. 2.1 Power-On Usage Note
    2. 2.2 EMC, EMI, and ESD Compliance
  5. 3System Description
    1. 3.1 Key Features
    2. 3.2 Functional Block Diagram
    3. 3.3 Power-On/Off Procedures
      1. 3.3.1 Power-On Procedure
      2. 3.3.2 Power-Off Procedure
    4. 3.4 Peripheral and Major Component Description
      1. 3.4.1  Clocking
        1. 3.4.1.1 Ethernet PHY Clock
        2. 3.4.1.2 AM64x/AM243x Clock
        3. 3.4.1.3 PCIe Clock
      2. 3.4.2  Reset
      3. 3.4.3  Power
        1. 3.4.3.1 Power Input
        2. 3.4.3.2 Reverse Polarity Protection
        3. 3.4.3.3 Current Monitoring
        4. 3.4.3.4 Power Supply
        5. 3.4.3.5 Power Sequencing
        6. 3.4.3.6 AM64x/AM243x Power
      4. 3.4.4  Configuration
        1. 3.4.4.1 Boot Modes
      5. 3.4.5  JTAG
      6. 3.4.6  Test Automation
      7. 3.4.7  UART Interfaces
      8. 3.4.8  Memory Interfaces
        1. 3.4.8.1 DDR4 Interface
        2. 3.4.8.2 MMC Interfaces
          1. 3.4.8.2.1 Micro SD Interface
          2. 3.4.8.2.2 eMMC Interface
        3. 3.4.8.3 OSPI Interface
        4. 3.4.8.4 SPI EEPROM Interface
        5. 3.4.8.5 Board ID EEPROM Interface
      9. 3.4.9  Ethernet Interface
        1. 3.4.9.1 DP83867 PHY Default Configuration
        2. 3.4.9.2 DP83869 PHY Default Configuration
        3. 3.4.9.3 Ethernet LED
      10. 3.4.10 Display Interface
      11. 3.4.11 USB 2.0 Interface
      12. 3.4.12 PCIe Interface
      13. 3.4.13 High Speed Expansion Interface
      14. 3.4.14 CAN Interface
      15. 3.4.15 Interrupt
      16. 3.4.16 ADC Interface
      17. 3.4.17 Safety Connector
      18. 3.4.18 SPI Interfaces
      19. 3.4.19 I2C Interfaces
      20. 3.4.20 FSI Interface
  6. 4Known Issues and Modifications
    1. 4.1 Issue 1 - Embedded XDS110 Connection to AM64x Target in CCS
    2. 4.2 Issue 2 - DC Barrel Jack Warning when Hot-Plugging
    3. 4.3 Issue 3 - uSD Card Boot Not Working
  7. 5References
  8. 6Revision History

3.4.3.1 Power Input

The following sections describe the power distribution network topology that supplies the EVM board, supporting components and reference voltages.

The AM64x/AM243x EVM board includes a power fix based on discrete power supply components. The initial stage of the power supply is 12 V from a barrel jack connector with part reference J6. J6 supports 8 A current rating and necessary diodes for reverse polarity protection and voltage surge protection. The 12 V input (VMAIN) of the EVM that is used to generate all necessary voltages required by the EVM.

A ON/OFF switch with part reference SW1 is provided to turn ON/OFF the EVM by connecting this switch to Enable pin of LM5140, thereby, allowing the switch to turn on or off the board based on the switch position. The board is in off condition when switch is grounded position 1-2 and in on condition when the switch is in position 2-3. Additionally, GPIO from the test automation header is also connected to the switch to control ON/OFF of the EVM through he test automation board. A fault indication LED LD5 is in ON status in case of reverse polarity. LD6 is in ON status to indicate VMAIN power good.

Note: The Switch SW1 does not turn off VMAIN. Switch SW1 only disables the VCC_5V0 output of LM5140 from which all other power supplies are derived.