SPRUIX0D February   2021  – August 2021

 

  1.   Trademarks
  2. 1Introduction
    1. 1.1 EVM Revisions and Assembly Variants
  3. 2Important Usage Notes
    1. 2.1 Power-On Usage Note
  4. 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
  5. 4Known Issues and Modifications
    1. 4.1 Issue 1 - Embedded XDS110 Connection to AM64x Target in CCS
    2. 4.2 Issue 2 - MDIO Ethernet PHY Communications
    3. 4.3 Issue 3 - DC Barrel Jack Warning when Hot-Plugging
  6. 5References
  7. 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 Source Supply Net

Slave Address

(IN HEX)		 Value of the Shunt Connected to the Supply Rail
VCC_CORE VDD_CORE 40 2mΩ ±1%
VDD_0V85 VDDAR_CORE 41 10mΩ ± 0.5%
VCC_3V3_SYS SoC_DVDD3V3 4C 10mΩ ± 0.5%
VCC1V8 SoC_DVDD1V8 4B 10mΩ ± 0.5%
VDDA1V8 VDDA_1V8 4E 10mΩ ± 0.5%
VCC1V2_DDR VDD_DDR4 46 10mΩ ± 0.5%