Olimex STMP15X-SOM and STMP1(A13)-EVB Eval Board Based on STM32MP1 SoC

Olimex STMP15X-SOM and STMP1(A13)-EVB Eval Board Based on STM32MP1 SoC


We saw several STM32MP1 SoC-based modules and SBCs entering the market in 2020. These include Ka-Ro Electronics’ QSMP module, Shiratech’s Stinger96 SBC, Exor Embedded NanoSOM nS02 module, and Octavo’s OSD32MP15x SiP module harnessing the functionalities of STM32MP1.

Recently, Olimex unveiled the release of STMicroelectronics’ STM32MP1 SoC-based products, the STMP15X-SOM SoM, and the STMP1(A13)-EVB eval board. The STM32MP15X SoC features dual-core Arm Cortex-A7/M4 combined with an LCD interface, dedicated to 3D Graphics Processing Unit (GPU). Additionally, the eval board is compatible with the new STM32MP1 module and the previous A13-based SOM.

Olimex STMP15X-SOM System on Modules

The STMP15X-SOM is a system-on-module (SoM) available in industrial and extended temperature ranges. It is pin to pin compatible with the A13-SOM System On Module. The STMP15X-SOM comes in three versions with variations in the SoC models. These include STMP151-SOM, STMP153-SOM, and STMP157-SOM. The modules come with a MicroSD card slot for memory storage and 256 or 512MB DDR3L of system memory.

Discussing further, the board design comes with an onboard Power Management Unit (PMU) based on AXP209 IC. It enables the power voltage to the SoC core, peripherals, DDR3L memory, and other components to be programmable through I2C. Generally, the PMU is included in battery-operated devices such as mobile phones and portable media players to reduce the amount of space required.

Top View of STMP15X-SOM

Moreover, when a regular power source fails or voltage drops to an unacceptable level, the onboard LiPo battery functions as an Uninterruptible Power Supply (UPS). Thus, it provides backup power to the SoC, memory, and PMU. The STMP15X-SOM also features the ES8388, a low-power stereo audio codec, designed for portable audio devices and many more.

Specifications of Olimex STMP15X-SOM

  • STM32MP151/153/157 is a dual-core Arm Cortex-A7 running up to 650 to 800 MHz with 209 MHz Cortex-M4.
  • ES8388 Stereo Audio codec to generate audio output
  • The module includes a Power Management Unit (PMU) based on the AXP209 IC and a LiPo battery charger.
  • It features 5V DC power, a RESET button, power and charge LEDs, boot select, and serial debug support.
  • The system on modules are available in Temperature Ranges of– Commercial grade: 0 to +70°C; Extended Temp grade: -20 to +85°C; Industrial grade: -40 to +85°C
  • The dimensions of the board are 60.96 x 30.48mm.

Bottom View of STMP15X-SOM

The manufacturer has also provided several board-to-board connectors. 39 GPIOs, 3x UARTs, 1x QuadSPI, 2x I2C, and 2x eMMC are available on the GPIO-1 40-pin connector. The GPIO-2 supports USB host, USB OTG, Audio mic, Audio HP, and ADC. The GPIO-3 is for USB-OTG and SPI. And a 40-pin RGB LCD connector for LCD-OLinuXino displays.

Olimex STMP1(A13)-EVB Eval Board

The SMP1(A13)-EVB is an evaluation board that functions as a carrier for Olimex’s Allwinner A13-SoM and the STM15X-SOM. The SoMs connects to the eval board via a 1.27mm pitch connection. Unlike the STMP15X-SOM, the STMP1(A13)-EVB is available only in commercial temperature rating 0 to 70°C.

Talking about the hardware specifications, the eval board has a flash module connector for SPI, eMMC, or NAND flash for storage. The network communication platform comes with a 10/100M Ethernet RJ45 connector. It also features WiFi/Bluetooth module with a PCB antenna and an optional external antenna. Displays are interfaced with a 40-pin 1.27 mm pitch connector for LCD-OLinuXino display. Additionally, there are 3.5mm audio jacks for a microphone and headphones each.

For expansion, the eval board comes with a Universal EXTension connector (UEXT) to connect different modules and sensors to SPI, UART, 12C, and also a GPIO connector. There are also 2x USB 2.0 host ports, 1x micro USB 2.0 OTG port, and a 5V DC power supply connector.

Coming to the software part, both boards run Linux mainline Kernel and Uboot. Bulgarian-based Olimex, on the other hand, recommends using its open-source Olimage Linux software. CNX Software’s post has brought to our attention that the company has developed some Linux 5.10 based Debian Buster and Ubuntu Focal images that are now available for the STMP15X-SOM module.

The STMP15X-SOM is available for €30 on the module’s product page. The STMP1(A13)-EVB eval board without module is available for €18 along with KiCAD files and PDF schematics on the product page. For more information visit the announcement page.

Saumitra Jagdale is a Backend Developer, Freelance Technical Author, Global AI Ambassador (SwissCognitive), Open-source Contributor in Python projects, Leader of Tensorflow Community India, and Passionate AI/ML Enthusiast

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