The SparkFun MicroMod STM32 Processor Board is ready to rock your MicroMod world with its ARM® Cortex®-M4 32-bit RISC core! This little Processor Board provides you with an economical and easy to use development platform if you're needing more power with minimal working space. With the M.2 MicroMod connector, connecting your STM32 Processor is a breeze. Simply match up the key on your processor's beveled edge connector to the key on the M.2 connector and secure it with a screw (included with all Carrier Boards). The STM32 is one of the most powerful and economical microcontrollers available so to be able to add it to your MicroMod Carrier Board is a huge advantage for your project!

As we previously stated; the STM32F405 Processor from STMicroelectronics, is based on the high-performance ARM® Cortex®-M4 32-bit RISC core and can operate at a frequency of up to 168 MHz. This core features a floating point unit (FPU) single precision which supports all ARM single precision data-processing instructions and data types. It also implements a full set of DSP instructions and a memory protection unit (MPU) which enhances application security. This Processor Board utilizes the DFU bootloader for uploading code, and incorporates an extensive range of enhanced I/Os and peripherals. To complement the STM32F405 processor, we've also added an additional 128Mb (16MB) serial flash memory chip to the underside of the board.

MicroMod is a modular interface ecosystem that connects a microcontroller “processor board” to various “carrier board” peripherals. Utilizing the M.2 standard, the MicroMod standard is designed to easily swap out processors on the fly. Pair a specialized carrier board for the project you need with your choice of compatible processor!

STM32 General Features:

• ARM® 32-bit Cortex®-M4 CPU with FPU
  • Adaptive real-time accelerator (ART Accelerator™) allowing 0-wait state execution from Flash memory
  • Frequency up to 168 MHz
  • Memory protection unit
  • 210 DMIPS/ 1.25 DMIPS/MHz (Dhrystone 2.1)
  • DSP instructions
• 1 MB of Flash memory
• 192 Kbytes of SRAM including 64 Kbytes of CCM (core coupled memory) data RAM
• Flexible static memory controller supporting Compact Flash, SRAM, PSRAM, NOR and NAND memories
• Clock, reset and supply management
  • 1.8 V to 3.6 V application supply and I/Os
  • 32 kHz oscillator for RTC with calibration
  • Internal 32 kHz RC with calibration
• Low-power operation
  • Sleep, Stop and Standby modes
• Debug mode
  • Serial wire debug (SWD) & JTAG interfaces
  • Cortex-M4 Embedded Trace Macrocell™
• Advanced connectivity
  • USB 2.0 full-speed device/host/OTG controller with on-chip PHY
  • USB 2.0 high-speed/full-speed device/host/OTG controller with dedicated DMA, on-chip full-speed PHY and ULPI
  • 10/100 Ethernet MAC with dedicated DMA: supports IEEE 1588v2 hardware, MII/RMII

Specific Peripherals available on MicroMod STM32:

• UART (Updated in V2.0)
• Two I²C Buses
• SPI Bus
• PDM Audio Processing
• Two Dedicated Analog Inputs, 15 total analog input capable inputs
• Two Dedicated Digital I/O Pins
• Two Dedicated PWM Pins, 24 total PWM capable
• Nine General Purpose I/O Pins
• 16MB flash storage

MicroMod STM32 Processor Documentation:

• Schematic
• Eagle Files
• Hookup Guide
• Board Dimensions
• Datasheet (STM32F405xx)
• GitHub Hardware Repo

MicroMod Documentation:

• SparkFun MicroMod Interface v1.0 - Pinout
• SparkFun MicroMod Interface v1.0 - Pin Descriptions
• Getting Started with MicroMod
• Designing with MicroMod
• MicroMod Info Page
• MicroMod Forums
• SparkFun Eagle Libraries contains example footprints for the M.2 connector and SMD standoff
• M.2 MicroMod Connector Datasheet
• MicroMod Reflowable Standoff Datasheet

STM32 Documentation:

• STM32 32-bit Arm Cortex MCUs
• High Performance MCUs