MYC-YA15XC-T CPU Module Instruction Manual

1. Introduction

The MYC-YA15XC-T CPU Module is a compact System-on-Module (SoM) measuring only 39mm by 37mm. It is based on STMicroelectronics' STM32MP1 series processors, specifically integrating the STM32MP151AAC3T processor by default, along with a dedicated Power Management IC (STPMIC1). This module features onboard DDR3L, Nand Flash or eMMC, and 32KB EEPROM.

A wide range of peripherals and I/O signals are exposed through a 1.0 mm pitch 148-pin stamp-hole (Castellated-Hole) expansion interface, making it an ideal embedded controller for diverse applications including industrial control, consumer electronics, smart home devices, and medical equipment. The MYC-YA15XC-T operates on Linux with a provided 5.4.31 kernel and includes many drivers in source code.

For development purposes, the MYD-YA15XC-T development board is available, which integrates the MYC-YA15XC-T CPU Module and extends various peripherals such as Debug serial port, USB Type-C DRP, USB2.0 HOST, Gigabit Ethernet, Micro SD Card Slot, LCD, and Camera interfaces. It also brings out numerous I/O signals via pin headers.

2. Key Features

2.1. Mechanical Parameters

• Dimensions: 39mm x 37mm
• PCB Layers: 10-layer design
• Power Supply: 5V/0.5A
• Working Temperature: 0~70°C (commercial grade) or -40~85°C (industrial grade)

2.2. Processor

• STMicroelectronics STM32MP151AAC3 Microprocessor (STM32MP153AAC3 and STM32MP157AAC3 are compatible and can be customized).
• Based on a heterogeneous single or dual Arm Cortex-A7 and Cortex-M4 cores architecture.
• STM32MP151: Single Cortex-A7 core up to 800 MHz, Cortex-M4 core @ 209 MHz.
• STM32MP153: Dual Cortex-A7 cores up to 800 MHz, Cortex-M4 core @ 209 MHz and CAN FD.
• STM32MP157: Dual Cortex-A7 cores up to 800 MHz, Cortex-M4 core @ 209 MHz, 3D GPU, DSI display interface and CAN FD.
• Each line offers security options (cryptography & secure boot).

2.3. Memory and Storage

• 256MB DDR3L, 256MB Nand Flash / 512MB DDR3L, 4GB eMMC Flash (configuration dependent)
• 32KB EEPROM

2.4. Peripherals and Signals

• Power Management IC (STPMIC1APQR)
• 1.0mm pitch 148-pin stamp hole expansion interface providing:
  • 8 x Serial ports
  • 5 x I2C interfaces
  • 4 x SPI interfaces
  • 16 x ADC channels
  • 2 x USB Host or 1 x USB Host plus 1 x USB OTG
  • 2 x SDIO interfaces
  • 1 x RGMII interface
  • 2 x CAN interfaces (available only for STM32MP153 and STM32MP157)
  • 5 x LPTIM and 10 TIM
  • 1 x RGB Interface (supports 16-/18-/24-bit, resolution up to 1366 x 768 @60fps)
  • Up to 109 x GPIOs

Note: The peripheral signals brought out to the expansion interface are listed in maximum number. Some signals are reused. Please refer to the processor datasheet and CPU Module pin-out description file for detailed information.

2.5. Operating System Support

• Linux 5.4.31

3. Setup Guide (MYD-YA15XC-T Development Board)

This section outlines the basic setup for the MYD-YA15XC-T Development Board, which hosts the MYC-YA15XC-T CPU Module. Ensure all components are handled with care to prevent damage from static electricity.

3.1. Initial Connections

1. Power Connection: Connect the provided 5V/2A power adapter to the DC JACK 5V Input (J1) on the development board.
2. Debug Console: For initial setup and debugging, connect a USB Type-C cable from your host PC to the USB Type C (Debug) port (J6). This will provide a serial console interface.
3. Storage (Optional): If you intend to boot from a Micro SD card, insert a prepared card into the Micro SD slot (J8).
4. Network (Optional): Connect an Ethernet cable to the Ethernet port (J3) for network access.
5. Peripherals (Optional): Connect any necessary USB peripherals (e.g., keyboard, mouse) to the USB HOST x2 ports (J4).
6. Display (Optional): If using a display, connect it to the appropriate RGB LCD interface (J15) or other display output options if available on your specific board configuration.

3.2. Boot Configuration

The board features a Boot Switch (SW1) with settings B3B2B1B0. This switch determines the boot source (e.g., Nand, eMMC, SD card). Refer to the specific documentation for your board to configure the correct boot mode for your desired operating system and storage medium.

3.3. Power On

After making all necessary connections and configuring the boot switch, press the PWR Key (SW4) to power on the development board. Observe the status LEDs (e.g., Run, PWR LED) for boot progress.

4. Operating Instructions

The MYC-YA15XC-T CPU Module runs a Linux 5.4.31 kernel. Interaction with the system is primarily through the serial debug console, SSH over Ethernet, or a connected display with input devices.

4.1. Accessing the System

• Serial Console: Use a terminal emulator (e.g., PuTTY, Tera Term) on your host PC, connected to the USB Type C (Debug) port, to access the Linux command line interface. Configure the serial port settings as specified in the Quick Start Guide (typically 115200 baud, 8N1).
• Network Access: Once the board has booted and obtained an IP address (via DHCP or static configuration), you can access it via SSH over the Ethernet connection.
• Graphical Interface (if configured): If your system is configured with a graphical desktop environment and a display is connected, you can interact with the system directly using a mouse and keyboard.

4.2. System Control Buttons

• Reset Key (SW2): Initiates a hardware reset of the module.
• User Key (SW3): A programmable button that can be configured for various user-defined functions within the operating system.
• PWR Key (SW4): Powers on/off the development board.

4.3. Software Development

The module supports Linux 5.4.31, providing a robust environment for embedded software development. MYIR provides drivers in source code, enabling customization and development of applications tailored to the module's hardware capabilities. Refer to the official MYIR documentation and STMicroelectronics resources for detailed software development guides and toolchains.

5. Maintenance

Proper maintenance ensures the longevity and reliable operation of your MYC-YA15XC-T CPU Module and development board.

• Environmental Conditions: Operate the module within the specified temperature range (0~70°C for commercial, -40~85°C for industrial). Avoid exposure to excessive moisture, dust, or corrosive environments.
• Cleaning: Keep the board clean and free from dust. Use a soft, dry brush or compressed air to remove dust. Do not use liquid cleaners directly on the board.
• Power Supply: Always use the recommended 5V/2A power adapter. Using an incorrect power supply can damage the module.
• Software Updates: Regularly check for and apply software updates for the Linux kernel and drivers from MYIR or the open-source community to ensure optimal performance, security, and access to new features.
• Handling: When handling the module, always use anti-static precautions (e.g., anti-static wrist strap) to prevent damage from electrostatic discharge (ESD).

6. Troubleshooting

This section provides general troubleshooting tips for common issues. For more complex problems, refer to the detailed technical documentation or contact support.

6.1. No Power/Boot

• Check Power Supply: Ensure the 5V/2A power adapter is correctly connected to the DC JACK and is functioning.
• Verify Power Button: Confirm the PWR Key (SW4) has been pressed.
• Boot Switch Settings: Double-check the Boot Switch (SW1) configuration matches your intended boot source (e.g., SD card, eMMC). Incorrect settings can prevent booting.
• SD Card Integrity: If booting from an SD card, ensure it is properly inserted and the image on it is not corrupted. Try re-flashing the SD card.

6.2. No Serial Console Output

• USB-C Cable: Ensure the USB Type-C cable is connected to the USB Type C (Debug) port (J6) and your host PC.
• Driver Installation: Verify that the necessary USB-to-serial drivers are installed on your host PC.
• Terminal Settings: Confirm your terminal emulator settings (baud rate, data bits, parity, stop bits) match the board's requirements (typically 115200, 8N1).

6.3. Network Connectivity Issues

• Ethernet Cable: Check that the Ethernet cable is securely connected to the Ethernet port (J3) and your network.
• Network Configuration: Verify the network settings within the Linux operating system (e.g., IP address, subnet mask, gateway, DNS).
• Router/Switch: Ensure your network router or switch is functioning correctly.

7. Specifications

Detailed technical specifications for the MYC-YA15XC-T CPU Module.

8. User Tips

Based on general best practices for embedded systems:

• Documentation: Always refer to the latest official documentation from MYIR and STMicroelectronics for detailed pin-out descriptions, software development kits (SDKs), and advanced configurations.
• Cooling: For applications operating at higher temperatures or under heavy load, consider implementing additional cooling solutions to ensure optimal performance and stability.
• Power Management: Utilize the power management features of the STM32MP1 processor and STPMIC1 to optimize power consumption for battery-powered or energy-efficient applications.
• Customization: Leverage the open-source Linux environment and provided source code drivers to customize the system for specific application requirements.

9. Warranty and Support

For specific warranty terms and conditions, please refer to the purchase agreement or contact your vendor directly. Technical support and additional resources can typically be found on the manufacturer's official website:

• MYIR Technology: www.myirtech.com
• STMicroelectronics: www.st.com

These websites often provide datasheets, user manuals, software downloads, and community forums that can be valuable resources for development and troubleshooting.