SPRAD05B May   2023  – December 2023 AM620-Q1 , AM623 , AM625 , AM625-Q1 , AM625SIP

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1 Introduction
    1. 1.1 Before Getting Started With the Board Design
    2. 1.2 Processor Selection
      1. 1.2.1 Note on AM625SIP Data Sheet
      2. 1.2.2 AM625 and AM625SIP Board Design Compatibility
    3. 1.3 Technical Documentation
    4. 1.4 Design Documentation
  5. 2 Block Diagram
    1. 2.1 Constructing the Block Diagram
    2. 2.2 Selecting the Boot Mode
    3. 2.3 Confirming Pinmux (Multiplexing Compatibility)
  6. 3 Power Supply
    1. 3.1 Power Supply Architecture
      1. 3.1.1 Integrated Power
      2. 3.1.2 Discrete Power
    2. 3.2 Power (Supply) Rails
      1. 3.2.1 Core Supply
      2. 3.2.2 Peripheral Power Supply
      3. 3.2.3 DDR PHY and SDRAM Power Supply
        1. 3.2.3.1 AM625 / AM623 / AM625-Q1 / AM620-Q1
        2. 3.2.3.2 AM625SIP
      4. 3.2.4 Internal LDOs for IO Groups (Processor IO Groups)
      5. 3.2.5 Dual-Voltage IOs (Processor IOs)
      6. 3.2.6 Dual-Voltage Dynamic Switching IOs
      7. 3.2.7 VPP (eFuse ROM programming supply)
    3. 3.3 Determining Board Power Requirements
    4. 3.4 Power Supply Filters
    5. 3.5 Power Supply Decoupling and Bulk Capacitors
      1. 3.5.1 AM625 / AM623 / AM625-Q1 / AM620-Q1
      2. 3.5.2 AM625SIP
      3. 3.5.3 Note on PDN target impedance
    6. 3.6 Power Supply Sequencing
    7. 3.7 Supply Diagnostics
    8. 3.8 Power Supply Monitoring
  7. 4 Clocking
    1. 4.1 Processor Clock Inputs
      1. 4.1.1 Unused WKUP_LFOSC0
      2. 4.1.2 LVCMOS Digital Clock Source
      3. 4.1.3 Crystal Selection
    2. 4.2 Clock Outputs
  8. 5 JTAG (Joint Test Action Group)
    1. 5.1 JTAG / Emulation
      1. 5.1.1 Configuration of JTAG / Emulation
        1. 5.1.1.1 AM625 / AM623
        2. 5.1.1.2 AM625-Q1 / AM620-Q1
        3. 5.1.1.3 AM625SIP
      2. 5.1.2 Implementation of JTAG / Emulation
      3. 5.1.3 Connection of JTAG Interface Signals
  9. 6 Configuration (Processor) and Initialization (Processor and Device)
    1. 6.1 Processor Reset
    2. 6.2 Latching of Boot Mode Configuration
    3. 6.3 Resetting the Attached Devices
    4. 6.4 Watchdog Timer
  10. 7 Processor Peripherals
    1. 7.1  Selecting Peripherals Across Domains
    2. 7.2  Memory (DDRSS)
      1. 7.2.1 AM625 / AM623 / AM625-Q1 / AM620-Q1
        1. 7.2.1.1 Processor DDR Subsystem and Device Register Configuration
        2. 7.2.1.2 Calibration Resistor Connection
      2. 7.2.2 AM625SIP
        1. 7.2.2.1 Reassigned DDRSS0 Pins on the AMK Package
        2. 7.2.2.2 Calibration Resistors Connection
    3. 7.3  Media and Data Storage Interfaces
    4. 7.4  Ethernet Interface Using Common Platform Ethernet Switch 3-port Gigabit (CPSW3G)
    5. 7.5  Programmable Real-Time Unit Subsystem (PRUSS)
    6. 7.6  Universal Serial Bus (USB) Subsystem
    7. 7.7  General Connectivity Peripherals
    8. 7.8  Display Subsystem (DSS)
      1. 7.8.1 AM625 / AM623 / AM625SIP / AM625-Q1
      2. 7.8.2 AM620-Q1
    9. 7.9  Camera Subsystem (CSI)
    10. 7.10 Connection of Processor Power Pins, Unused Peripherals and IOs
      1. 7.10.1 AM625 / AM623 / AM625-Q1 / AM620-Q1
      2. 7.10.2 AM625SIP
      3. 7.10.3 External Interrupt (EXTINTn)
      4. 7.10.4 Reserved Pins (Signals)
  11. 8 Interfacing of Processor IOs ( LVCMOS or Open-Drain or Fail-Safe Type IO Buffers) and Simulations
    1. 8.1 AM625 / AM623
    2. 8.2 AM625-Q1 / AM620-Q1
    3. 8.3 AM625SIP
  12. 9 Power Consumption and Thermal Analysis
    1. 9.1 Power Consumption
    2. 9.2 Maximum Current for Different Supply Rails
    3. 9.3 Power Modes
    4. 9.4 Thermal Design Guidelines
      1. 9.4.1 AM625 / AM623
      2. 9.4.2 AM625-Q1 / AM620-Q1
      3. 9.4.3 AM625SIP
  13. 10Schematic Design, Capture and Review
    1. 10.1 Selection of Components and Values
    2. 10.2 Schematic Design and Capture
    3. 10.3 Schematics Review
  14. 11Floor Planning, Layout, Routing Guidelines, Board Layers and Simulation
    1. 11.1 Escape Routing for PCB Design
    2. 11.2 DDR Design and Layout Guidelines
      1. 11.2.1 AM625 / AM623 / AM625-Q1 / AM620-Q1
      2. 11.2.2 AM625SIP
    3. 11.3 High-Speed Differential Signal Routing Guidelines
    4. 11.4 Board Layer Count and Stack-up
      1. 11.4.1 AM625 / AM623 / AM625-Q1 / AM620-Q1
      2. 11.4.2 AM625SIP
      3. 11.4.3 Simulation Recommendations
    5. 11.5 Reference for the Steps to be Followed for Running Simulation
  15. 12Device Handling and Assembly
    1. 12.1 Soldering Recommendations
      1. 12.1.1 Additional References
  16. 13References
    1. 13.1 AM625SIP
    2. 13.2 AM625 / AM623
    3. 13.3 AM625-Q1 / AM620-Q1
    4. 13.4 AM625 / AM623 / AM625-Q1 / AM620-Q1
    5. 13.5 Common for all AM62x family of processors
  17. 14Terminology
  18. 15Revision History

6.1 Processor Reset

The processor includes three external reset input pins (MCU Domain cold reset (MCU_PORz), MCU Domain warm reset (MCU_RESETz) and Main Domain warm reset request (RESET_REQz)). Note the errata related to MCU_RESETz and MCU_RESETSTATz.

Be sure to make the recommended connections in the Pin Connectivity Requirements section of the device-specific data sheet.

The reset methods supported by the processor are described in detail in the device-specific data sheet and TRM.

The processor provides three reset status output pins (MCU Domain warm reset status (MCU_RESETSTATz), Main Domain POR (cold reset) status (PORz_OUT) and Main Domain warm reset status (RESETSTATz)). Note the errata related to MCU_RESETz and MCU_RESETSTATz.

Use of Reset status outputs are application dependent. Reset status outputs when not used can be left unconnected. It is recommended to provision for a test point for testing or future enhancements.

3.3 V inputs can be applied to MCU_PORz (3.3 V tolerant, fail-safe input). The input thresholds are a function of the 1.8 V IO supply voltage (VDDS_OSC0).

It is recommended to hold the MCU_PORz low during the supply ramp-up and crystal/oscillator start-up. Follow the recommended MCU_PORz timing requirement in the Power-Up Sequencing diagram of the device-specific data sheet.

Additional reset modes are available through processor internal registers and emulation.

Note: MCU_RESETz and MCU_RESETSTATz have specific use case recommendation. Refer device-specific silicon errata.