MYiR Tech MYC-LD25X – A compact STM32MP25 system-on-module running Debian 12

MYiR Tech’s MYC-LD25X is a compact 39x37mm system-on-module built around the STMicro STM32MP25 dual-core Cortex-A35 SoC running at 1.5GHz with a Cortex-M33 core, and an NPU capable of 1.35 TOPS. The module comes with up to 2GB LPDDR4 RAM, 8GB eMMC storage, and a range of connectivity options, including Gigabit Ethernet, USB, CAN FD, UART, and SPI. Designed for industrial HMI, edge computing, energy systems, and automation, the MYC-LD25X is suitable for high-performance applications in these fields.

Previously, we covered other development boards from MYiR, including the MYD-J7A100T, MYD-YG2UL, MYD-YG2LX, and MYD-J1028X. We also wrote about other STM32MP25-based system-in-package and system-on-module namely the Digi ConnectCore MP25 and Octavo OSD32MP2. Feel free to check them out if you’re interested.

MYC-LD25X STM32MP25-based System-On-Module

MYC-LD25X specifications:

• SoC – STMicro STM32MP257D processor
  • CPU – Dual-core Arm Cortex-A35 64-bit RISC core operating at up to 1.5 GHz
  • MPU – 32-bit Arm Cortex-M33 RISC core clocked at up to 400 MHz
  • GPU – Unnamed 3D GPU
  • AI accelerator – 1.35 TOPS NPU (Neural processing unit)
  • VPU – H.264 hardware video decoder and encoder
• System Memory – up to 2GB LPDDR4 RAM
• Storage – 8GB eMMC flash and 256Kbit EEPROM
• 252 pads on LGA Package
  • Storage – 2x SD/MCC
  • Display – 1x MIPI DSI, 1x Parallel RGB, 2x LVDS
  • Camera – 1x MIPI CSI, 1x DCMI
  • Audio – 4x SAI
  • Ethernet – 3x RGMII
  • USB – 1x USB2.0, 1x USB 3.0
  • Other I/Os – Up to 128x GPIOs, 4x USART, 5x UART, 8x SPI, 7x I2C, 4x I3C, 3x CAN FD
  • Debugging – 1x JTAG, 1x SWD
• Power Management
  • Input – 5V/3A
  • STMicro STPMIC25APQR PMIC
• Dimension – 39mm x 37mm (12-layer PCB design)
• Temperature Range – -40 to 85 Celsius (industrial grade)

The MYC-LD25X supports Linux 6.1 and Debian 12, offering flexibility for different project needs. MYiR provides a complete software package, including kernel and driver source code along with compilation tools to streamline development from design to implementation.

MYD-LD25X development board

The MYD-LD25X development board uses the MYC-LD25X SOM as its core controller. It leverages the full capabilities of the STMicro STM32MP2 SoC and offers key features such as 3x debug serial ports (for Cortex-A35, Cortex-M33, and SWD), 3x Gigabit Ethernet interfaces, a WiFi/BT module, an LVDS display interface, and an HDMI display interface.

The MYD-LD25X development board specification:

• Supported SoM – MYC-LD25X CPU module described above
• Storage – 1x MicroSD card slot
• Display interfaces – 1x HDMI port, 1x LVDS FPC connector
• Camera – MIPI-CSI FPC connector
• Audio – 3.5mm audio jack for input and output
• Connectivity
  • 3x Gigabit Ethernet RJ45 ports
  • AP6256 WiFi/BT Module (complies with IEEE 802.11 a/b/g/n/ac standard and supports BluetoothV5.2)
  • 1x U.FL PCB antenna connector for WiFi/BT Module
• USB
  • 2x USB 2.0 OTG port
  • 1x USB 2.0 OTG port
  • USB Type-C port for power
• Serial ports – 3x Debug Serial Ports (1x Cortex-A35, 1x Cortex-M33 and one for SWD)
• Expansion – 40-pin (mostly) Raspberry Pi-compatible GPIO header with GPIO/I2C/UART/SPI/CAN, support for MY-WIREDCOM RPI module with RS485, RS232 and CAN Bus
• Misc
  • 1x Power on/off switch
  • Boot DIP switch
  • 3x buttons (1x Reset, 1x Power On/Off, 1x User)
  • LANKE LK8563T RTC with battery
• Power Supply – 5V/3A supply via Type-C port
• Dimension – 120 mm x 70 mm (6-layer PCB design)
• Temperature range: -40~85 Celsius (industrial grade), but for WiFi/BT Module: -30~85 Celsius

The MYD-LD25X Development Board comes with a Quick Start Guide and a USB to TTL cable. MYiR also offers additional modules such as the MY-LVDS070C 7-inch LCD, the MY-CAM003M Camera Module, and the MY-WIREDCOM RPI Module as optional add-ons. Both the MYC-LD25X and MYD-LD25X are available in 1GB and 2GB variants.

The MYC-LD25X is priced at $43.80 for the 1GB model and $49.80 for the 2GB model, while the MYD-LD25X is available at $75 for 1GB and $81 for 2 GB. Additional add-on modules and further details, including purchase links, can be found on the product page and in the press release.

Sayantan Nandy

Sayantan Nandy, an electronics engineer with over four years of hands-on experience in PCB design, circuit development and power electronics, is proficient in EAGLE CAD, Ki-Cad, and Altium. He has a proven track record of delivering efficient and effective systems. His expertise extends from R&D, and prototyping to production support, making him a valuable asset to any engineering team.

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