A Smaller STM32MP1 SoM – Meet MYIR MYC-YA15XC-T CPU Module

MYIR launched a fairly compact SoM and accompanying development board based on STM32MP1 Cortex-A7 microprocessor in January 2020. But apparently, the 45mm by 43mm MYC-YA157C module was too big (or expensive) for some customers, so the company has now designed a smaller STM32MP1 SoM with MYC-YA157C-T measuring just 39mm by 37mm thanks to the removal of the Ethernet PHY.

MYC-YA15XC-T STM32MP1 system-on-module

Smaller STM32MP1 SoM
MYC-YA15XC-T (2021) vs MYC-YA157C (2020)


  • SoC (one or the other)
    • STM32MP151AAC3 single-core Cortex-A7 processor up to @ 800 MHz with Cortex-M4 core @ 209 MHz
    • STM32MP153AAC3 dual-core Cortex-A7 processor up to @ 800 MHz with Cortex-M4 core @ 209 MHz, and CAN FD interface
    • STM32MP157AAC3 dual-core Cortex-A7 processor up to @ 800 MHz, with Cortex-M4 core @ 209 MHz, 3D GPU, DSI display interface, and CAN FD
  • Two configurations for memory and storage
    • 256MB DDR3L, 256MB Nand Flash, 32KB EEPROM or
    • 512MB DDR3L, 4GB eMMC Flash, 32KB EEPROM
  • 148-pin stamp hole expansion interface (1.0mm pitch )
    • Display I/F – 16-/18-/24-bit RGB Interface up to 1366 x 768 @ 60fps
    • Networking – 1x RGMII interface
    • USB – 2x USB Host or 1x USB Host plus 1x USB OTG
    • Up to 8x Serial ports
    • Up to 5x I2C, 4x SPI
    • Up to  16x ADC
    • 2x SDIO
    • 2x CAN (only for STM32MP153 and STM32MP157)
    • 5x LPTIM and 10 TIM
    • Up to 109 x GPIOs
  • Power Management IC – STPMIC1APQR
  • Power supply – 5V/0.5A
  • Dimensions – 39 x 37mm (10-layer PCB design)
  • Temperature Range – Commercial: 0~70°C or industrial -40~85°C
MYC-YA15XC-T CPU Module (delivered with shielding cover
MYC-YA15XC-T CPU module ships with a shielding cover by default

The module is especially suited to industrial control, consumer electronics, smart home, medical devices, and the company provides Linux 5.4.31 and the source code for the necessary drivers.

While MYC-YA15XC-T CPU is the smallest STM32MP1 system-on-module from MYIR Tech, other have designed even smaller module including NanoSOM nS02 (25.4 x 25.4 x 3 mm), and if you really need something as compact as possible Octavo Systems OSD32MP15x system-in-package comes with STM32MP1  processor, up to 1GB RAM, and the PMIC in just an 18x18mm footprint, albeit with eMMC flash storage.

MYD-YA15XC-T Development Board

MYD-YA15XC-T development board
To quickly get started with the module, MYIR also offers the MYD-YA15XC-T development board with the following key features:

  • System-on-module – MYIR MYC-YA15XC-T described above
  • Storage – MicroSD card slot
  • Display I/F
    • 50-pin FPC connector for LCD display up to 1366 x 768 @ 60fps. Supports MYIR’s MY-LCD70TP-C LCD Module with capacitive touch screen
    • 50-pin 2.54mm pitch header RGB/TP Extension Interface
    • HDMI via MYIR’s MY-RGB2HDMI Module through the LCD interface
  • Camera I/F
    • 30-pin FPC connector for MYIR’s MY-CAM011B camera module
    • 20-pin 2.54mm pitch expansion header with MIPI CSI
  • Networking – Gigabit Ethernet port via AR8035
  • USB – 2x USB 2.0 host ports, 1x USB Type-D
  • Expansions
    • 40-pin Raspberry Pi (mostly) compatible header with 2x SPI, 2x UART, 2x I2C, 1x CAN, 1x SAI
    • 20-pin header with 2x USB, 2x ADC, GPIOs
    • 20-pin header with 1x SDIO, 2x UART
  • Debugging – USB-C port for UART/serial console
  • Misc – 2 x LEDs (power and system), 3x buttons (power, reset, user), and RTC battery header
  • Power Supply – 5V via a power barrel jack
  • Dimensions – 137 x 105 mmSTM32MP153 board with camera, RGB LCD

Besides the camera and display modules, the company can also provide other expansion boards such as an LCD to HDMI module,  the MY-WIREDCOM RPI module to extend CAN, RS485, and RS232 functions through the Raspberry Pi header, as well MY-WF005S WiFi/BT module connected via the header with SDIO.

Pricing and availability

MYIR Smaller STM32MP1 Modules

MYIR offers four main variants of MYC-YA15XC-T STM32MP1 system-on-module with a combination of memory, storage, and temperature range options. But since it’s possible to select STM32MP151, STM32MP153, or STM32MP157, there’s a wider range of options than the table above implies. Pricing starts at $20 per unit for the entry-level module based on STM32MP151, with 256MB RAM, 256MB NAND flash, and a commercial temperature range. The STM32MP151 development board is sold for $69 or $79 depending on the select memory/storage option.

You’ll find more details, including hardware documentation, and the online store to order the module, development board, and accessories on MYIR’s website.

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