SPRUJ51A June   2023  – November 2025

 

  1.   1
  2.   Description
  3.   Features
  4.   4
  5. 1Evaluation Module Overview
    1. 1.1 Introduction
    2. 1.2 Kit Contents
    3. 1.3 Device Information
    4. 1.4 EVM Revisions and Assembly Variants
    5. 1.5 Specification
  6. 2Hardware
    1. 2.1  Additional Images
    2. 2.2  Key Features
      1. 2.2.1 Processor
      2. 2.2.2 Memory
      3. 2.2.3 JTAG Emulator
      4. 2.2.4 Supported Interfaces and Peripherals
      5. 2.2.5 Expansion Connectors Headers to Support Application Specific Add On Boards
    3. 2.3  Power
      1. 2.3.1 Power Requirements
      2. 2.3.2 Power Input
      3. 2.3.3 Power Supply
      4. 2.3.4 Power ON OFF Procedures
        1. 2.3.4.1 Power-On Procedure
        2. 2.3.4.2 Power-Off Procedure
        3. 2.3.4.3 Power Test Points
      5. 2.3.5 Power Sequencing
      6. 2.3.6 AM62x 17x17 SoC Power
      7. 2.3.7 Current Monitoring
    4. 2.4  AM62x-Low Power SK EVM Interface Mapping
    5. 2.5  Clocking
    6. 2.6  Reset
    7. 2.7  OLDI Display Interface
    8. 2.8  CSI Interface
    9. 2.9  Audio Codec Interface
    10. 2.10 HDMI Display Interface
    11. 2.11 JTAG Interface
    12. 2.12 Test Automation Header
    13. 2.13 UART Interface
    14. 2.14 USB Interface
      1. 2.14.1 USB2.0 Type A Interface
      2. 2.14.2 USB2.0 Type C Interface
    15. 2.15 Memory Interfaces
      1. 2.15.1 LPDDR4 Interface
      2. 2.15.2 OSPI
      3. 2.15.3 MMC Interfaces
        1. 2.15.3.1 MMC0 - eMMC Interface
        2. 2.15.3.2 MMC1 - Micro SD Interface
        3. 2.15.3.3 MMC2 - M2 Key E Interface
      4. 2.15.4 EEPROM
    16. 2.16 Ethernet Interface
      1. 2.16.1 CPSW Ethernet PHY1 Default Configuration
      2. 2.16.2 CPSW Ethernet PHY2 Default Configuration
    17. 2.17 GPIO Port Expander
    18. 2.18 GPIO Mapping
    19. 2.19 AM62x-Low Power SK EVM User Setup and Configuration
      1. 2.19.1 EVM DIP Switches
      2. 2.19.2 Boot Modes
      3. 2.19.3 User Test LEDs
    20. 2.20 Expansion Headers
      1. 2.20.1 User Expansion Connector
      2. 2.20.2 MCU Connector
      3. 2.20.3 PRU Connector
    21. 2.21 Push Buttons
    22. 2.22 I2C Address Mapping
  7. 3Hardware Design Files
  8. 4Compliance Information
    1. 4.1 EMC, EMI and ESD Compliance
  9. 5Additional Information
    1. 5.1 Known Issues and Modifications
    2.     Trademarks
    3.     72
  10. 6Revision History

2.5 Clocking

The clocking architectue of the AM62x Low-Power SK EVM is shown below.

Clock architecture Figure 2-6 Clock architecture

A clock generator of part number LMK1C1104PWR is used to drive the 25MHz clock to the SOC and two Ethernet PHYs. LMK1C1104PWR is a 1:4 LVCMOS clock buffer, which takes the 25MHz crystal/LVCMOS reference input and provides four 25MHz LVCMOS clock outputs. The source for the clock buffer shall be either the CLKOUT0 pin from the SOC or a 25MHz oscillator, the selection is made using a set of resistors. By default, an oscillator is used as input to the clock buffer on the AM62x Low Power SK EVM . Output Y2 and Y3 of the clock buffer are used as reference clock inputs for two Gigabit Ethernet PHYs. Output Y4 of the clock buffer are used as reference clock inputs for CSI Camera interface.

There is one external crystal attached to the AM62x SoC to provide clock to the WKUP domain of the SoC (32.768KHz).

SoC Wakeup Domain Clock Figure 2-7 SoC Wakeup Domain Clock

Clock inputs required for peripherals such as XDS110, FT4232, HDMI transmitter and audio codec are generated locally using separate crystals or oscillators. Crystals or oscillators used to provide the reference clocks to the EVM peripherals are shown in Table 2-7.

Table 2-7 Peripheral Clocking Table
Peripheral Mfr.Part # Description Frequency
XDS110 emulator(Y3)XRCGB16M000FXN01R0CRY 16.000MHz 8pF SMD16.000MHz
FT4232 Bridge(Y4)445I23D12M00000CRY 12.000MHz 18pF SMD12.000MHz
Audio Codec(U64)KC3225Z12.2880C1KX00OSC 12.288MHz CMOS SMD12.288MHz
HDMITransmitter(U9)KC3225Z12.2880C1KX00OSC 12.288MHz CMOS SMD12.288MHz

The clock required by the HDMI transmitter can be provided by either the on board oscillator or the SoC’s AUDIO_EXT_REFCLK1, which can be selected through a resistor mux. SoC’s EXT_REFCLK1 is used to provide clock to the User Expansion Connector on the SK EVM. The 32KHz clock to the M.2 module is provided by WKUP_CLKOUT0 of AM62x SoC through a voltage translational buffer.