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

Specifications:

• 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

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

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 mm

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 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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