SPRUIG1A September   2017  – October 2025

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4.   4
  5. 1 Introduction
    1. 1.1 EVM System View
    2. 1.2 Schematics/Design/Errata Files
    3. 1.3 Other Useful Links
  6. 2 Important Usage Notes
    1. 2.1 Isolated Power Supply
    2. 2.2 Powering On EVM
    3. 2.3 Powering Off EVM
    4. 2.4 Removing Processor and LCD Module Boards
    5. 2.5 Removing Camera Module Board
    6. 2.6 Caution: Hot Surface
  7. 3 System Description
    1. 3.1 System Board Diagram
    2. 3.2 Processor
    3. 3.3 Clocks
    4. 3.4 Reset Signals
  8. 4 Power System
    1. 4.1 Power Source
    2. 4.2 Power Nets
    3. 4.3 Power Management IC Power Supplies
    4. 4.4 APM Sense Resistors
  9. 5 Configuration/Setup
    1. 5.1 Boot and Emulation Setup
      1. 5.1.1 Emulation and Hardware Setup
    2. 5.2 I2C Address Assignments
    3. 5.3 I2C ID Memory
  10. 6 Processor Module Functional Block Descriptions
    1. 6.1 Memory
      1. 6.1.1 4KB EEPROM (Board Identity Memory)
      2. 6.1.2 2GB DDR3L
      3. 6.1.3 eMMC Flash Memory
      4. 6.1.4 MicroSD (MMC1) Connector
    2. 6.2 Temperature Sensor
    3. 6.3 Real Time Clock
    4. 6.4 10/100/1000 Ethernet
    5. 6.5 USB
    6. 6.6 Audio
    7. 6.7 HDMI
    8. 6.8 eSATA
    9. 6.9 Serial Debug Header
  11. 7 AM572x EVM LCD Module Functional Block Descriptions
    1. 7.1 LCD Screen
    2. 7.2 Capacitive Touch Screen
    3. 7.3 mSATA
    4. 7.4 miniPCIe
    5. 7.5 COM8 Interface – Mobile Connectivity Expansion Connector
  12. 8 AM572x EVM Camera Module Functional Block Descriptions
  13. 9 Board Connectors
    1. 9.1  Gigabit Ethernet - P5 (Processor Module)
    2. 9.2  eSATA / USB - P6 (Processor Module)
    3. 9.3  USB
      1. 9.3.1 AM572x USB2 (USB 2.0 Client) - P7 (Processor Module)
      2. 9.3.2 AM572x USB1 (USB 3.0 Host) - P13, P15 (Processor Module)
    4. 9.4  Serial Debug Header - P10 (Processor Module)
    5. 9.5  HDMI - P11 (Processor Module)
    6. 9.6  MicroSD - P12 (Processor Module)
    7. 9.7  Expansion Connectors
      1. 9.7.1 Processor Module P16/LCD Module P1
      2. 9.7.2 Processor Module P17 / LCD Module P3
      3. 9.7.3 Processor Module P18 / LCD Module P4
      4. 9.7.4 Processor Module P19 / LCD Module P2
    8. 9.8  JTAG Connector
    9. 9.9  LCD Connector - P5 (LCD Module)
    10. 9.10 Touchscreen Connector - P15 (LCD Module)
    11. 9.11 PCI-Express Mini Card Slot - P7 (LCD Module)
    12. 9.12 mSATA Connector - P8 (LCD Module)
    13. 9.13 Camera Connector - P9 (LCD Module), P9 (Camera Module)
    14. 9.14 Communications Connector - P12 (LCD Module)
  14. 10References
  15. 11Revision History

6.3 Real Time Clock

A battery back external Real Time Clock (RTC) MCP79410 is provided to keep the current clock active while the board is powered down. It can be used in conjunction with the internal Real Time Clock of the processor which will reset when power is removed from the board.

In addition to the typical RTC functions, the MCP79410 device has 64 bytes of battery backed RAM and 1Kb of EEPROM.

The MCP79410 RTC IC will only keep time when RTC coin battery is installed. The AM572x GP EVM does not ship with a coin battery. However, the Processor Module includes connections for a CR1220 non-rechargeable battery that is capable of supplying 35mAh of backup power and is sufficient to keep the RTC active for a couple of years.

The CR1220 battery must be installed by a trained technician. When installing the CR1220, make sure to remove R416 that shorts across the battery. R416 is needed for MCP79410 to operate without a battery. After the battery is installed, make sure to not short the battery by placing the board on a conductive surface when not in use, as the RTC time will be lost.