SPRUIY9B May   2021  – October 2023

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Key Features
  5. 2EVM Revisions and Assembly Variants
  6. 3Important Usage Notes
  7. 4System Description
    1. 4.1 Key Features
    2. 4.2 Functional Block Diagram
    3. 4.3 Power-On/Off Procedures
      1. 4.3.1 Power-On Procedure
      2. 4.3.2 Power-Off Procedure
    4. 4.4 Peripheral and Major Component Description
      1. 4.4.1  Clocking
        1. 4.4.1.1 Ethernet PHY Clock
        2. 4.4.1.2 AM64x SoC Clock
      2. 4.4.2  Reset
      3. 4.4.3  Power
        1. 4.4.3.1 Power Input
        2. 4.4.3.2 USB Type-C Interface for Power Input
        3. 4.4.3.3 Power Fault Indication
        4. 4.4.3.4 Power Supply
        5. 4.4.3.5 Power Sequencing
        6. 4.4.3.6 Power Supply
      4. 4.4.4  Configuration
        1. 4.4.4.1 Boot Modes
      5. 4.4.5  JTAG
      6. 4.4.6  Test Automation
      7. 4.4.7  UART Interface
      8. 4.4.8  Memory Interfaces
        1. 4.4.8.1 LPDDR4 Interface
        2. 4.4.8.2 MMC Interface
          1. 4.4.8.2.1 Micro SD Interface
          2. 4.4.8.2.2 WiLink Interface
          3. 4.4.8.2.3 OSPI Interface
          4. 4.4.8.2.4 Board ID EEPROM Interface
      9. 4.4.9  Ethernet Interface
        1. 4.4.9.1 DP83867 PHY Default Configuration
        2. 4.4.9.2 DP83867 – Power, Clock, Reset, Interrupt and LEDs
        3. 4.4.9.3 Industrial Application LEDs
      10. 4.4.10 USB 3.0 Interface
      11. 4.4.11 PRU Connector
      12. 4.4.12 User Expansion Connector
      13. 4.4.13 MCU Connector
      14. 4.4.14 Interrupt
      15. 4.4.15 I2C Interface
      16. 4.4.16 IO Expander (GPIOs)
  8. 5Known Issues
    1. 5.1 Issue 1: LP8733x Max output Capacitance Spec Exceeded on LDO0 and LDO1
    2. 5.2 Issue 2: LP8733x Output Voltage of 0.9V Exceeds AM64x VDDR_CORE max Voltage Spec of 0.895 V
    3. 5.3 Issue 3 - SDIO Devices on MMC0 Require Careful Trace Lengths to Meet Interface Timing Requirements
    4. 5.4 Issue 4 - LPDDR4 Data Rate Limitation in Stressful Conditions
    5. 5.5 Issue 5 - Junk Character
    6. 5.6 Issue 6 - Test Power Down Signal Floating
    7. 5.7 Issue 7 - uSD Boot Not Working
  9. 6Regulatory Compliance
  10. 7Revision History

4.1 Key Features

Major Features of AM64B SKEVM are as follows:

  • Includes AM64x SoC, Memory, boot interfaces, on-board JTAG and power supply circuit.
  • Provides general purpose expansion interfaces for hardware add on boards.
  • Operates in a stand-alone mode without any of the daughter cards.
  • Powered through USB Type-C Connector.
  • External Communication through Giga-Bit Ethernet Ports (x2) and USB 3.0 Type-A (x1).
  • USB3.0 high speed interface terminated on Type-A USB Host connector.
  • Wi-link WL1837 Module with support for both Wi-Fi and Bluetooth.
  • Optionally supply the power needed for the daughter cards (limited to 500 mA on 3V3 and 155 mA on 5 V rail).

AM64x System-on-Chip (SoC):

  • AM64x combines two instances of Sitara’s gigabit TSN-enabled PRU-ICSSG with up to two Arm Cortex-A53 cores, up to four Cortex-R5F MCUs, and a Cortex-M4F MCU. The SoC is soldered to the PCB without socket.

Memory

  • 2GB DDR4 supporting data rate up to 1600MT/s
  • Micro Secure Digital (SD) Card with UHS-1 support
  • 512 Mbit OSPI EEPROM
  • 512 Kbit Inter-Integrated Circuit (I2C) board ID EEPROM

High Speed Interface:

  • Two CPSW Gigabit Ethernet (RGMII) ports interfaced with Texas Instruments Gigabit Ethernet PHYs
  • One USB3.0 Host interface terminated on a USB Type-A connector for data transfer

Expansion Bus:

  • 3x Expansion connectors using 0.1" spaced 0.025" square post connectors
    • 1x Raspberry Pi compatible 40 pin expansion connector allowing seamless integration to HAT boards
    • 1x PRU 54 pin connector to PRG0 interface
    • 1x MCU 28 pin connector

Debug:

  • XDS110 On-Board Emulator
  • Supports 20-pin JTAG connection from external emulator
  • Automatic selection between on-board and external emulator (higher priority)
  • Dual port Universal Asynchronous Receiver/Transmitter (UART) to USB circuit over micro-B USB connector prodivded via CP2105
  • 2x 8-Bit DIP Switches for user selection of SoC Boot Modes
  • 1x Push button for Interrupt SoC GPIO
  • LEDs. One for Main Power, one for PMIC good, 1 for MCU Domain, 1 for MCU Domain GPIO and others connected to the two industrial interfaces

Power Supply:

  • The SK-AM64B EVM is powered through a USB Type-C Connector.
  • 5 V is stepped down to 3V3 by LM61460AASQRJRRQ1 regulator. VCC3V3SYS_EXT is the input supply to the PMIC.
  • TPS6522053RHBR PMIC and other discrete regulators on the starter kit provide all the required power supplies for SoC and other peripherals (LPDDR4, Wi-Fi Module, and OSPI, Clock buffers, Level translators and logic gates).
  • Dedicated regulators are also provided for:
    • Powering the always-on circuits of the Test Automation Header section.
    • E-Fuse programming of the SoC.
    • XDS110 Debugger section.
    • 3V3 for SoC and peripherals.
    • 1V0 for Ethernet Phys.
  • Recommended Power Supplies:
    • CUI Inc. 5 V 15W AC/DC External Wall Mount Adapter - SWC15-S5-NB
    • GlobalTek Inc. 5 V 15W AC/DC External Mount Wall Adapter - WR9QA3000USBC3MNA-CIMR6B
    • Qualtek USB 2.0 Cable C Male to C Male 3.28' Shielded Cable for powering the boards through a laptop Type-C port - 3021091-01M
  • Status Output: LEDs to indicate power status

Compliance:

  • RoHS Compliant
  • REACH Compliant