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

3.4.3.3 Current Monitoring

INA226 power monitor devices are used to monitor current and voltage of various power rails of AM64x/AM243x processor. The INA226 interfaces to the AM64x/AM243x through I2C interface. Four terminal, high precision shunt resistors are provided to measure load current.

Table 3-3 INA Devices I2C Slave Address
Power SourceSupply Net

Slave Address

(IN HEX)		Value of the Shunt Connected to the Supply Rail
VCC_COREVDD_CORE40 2 mΩ ±1%
VDD_0V85VDDAR_CORE41 10 mΩ ± 0.5%
VCC_3V3_SYSSoC_DVDD3V34C 10 mΩ ± 0.5%
VCC1V8SoC_DVDD1V84B 10 mΩ ± 0.5%
VDDA1V8VDDA_1V84E 10 mΩ ± 0.5%
VCC1V2_DDRVDD_DDR446 10 mΩ ± 0.5%