SparkFun

MicroMod STM32F405 Processor Board

Name: MicroMod STM32F405 Processor Board
Brand: SparkFun
SKU: SF-DEV-21326
Price: 43.04 AUD
Availability: InStock

· MPN: DEV-21326

Microcontrollers & Development Boards STM32

$43.04 |

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This compact MicroMod processor board adds an STM32F405 to a compatible MicroMod Carrier Board, giving your project an ARM® Cortex®-M4 32-bit RISC core in a ...

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This compact MicroMod processor board adds an STM32F405 to a compatible MicroMod Carrier Board, giving your project an ARM® Cortex®-M4 32-bit RISC core in a small, swappable M.2 module.

The bevelled edge connector keys into the MicroMod M.2 socket and is secured with the screw supplied with MicroMod Carrier Boards. It uses a DFU bootloader for uploading code and brings enhanced I/Os and peripherals out through the MicroMod pinout.

The STM32F405 can operate at up to 168 MHz and includes an FPU, DSP instructions and a memory protection unit. SparkFun has also added a 128Mb (16MB) serial flash memory chip to the underside of the board for extra storage.

MicroMod is a modular ecosystem for pairing a microcontroller processor board with the carrier board that suits your project. Documentation available from SparkFun includes a hookup guide, schematic, Eagle files, board dimensions, STM32F405xx datasheet and hardware repository.

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
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

Specifications:

Processor: STM32F405
Core: ARM® Cortex®-M4 32-bit RISC core
Bootloader: DFU bootloader for uploading code
Maximum frequency: up to 168 MHz
Performance: 210 DMIPS/ 1.25 DMIPS/MHz (Dhrystone 2.1)
Flash memory: 1 MB of Flash memory
SRAM: 192 Kbytes of SRAM including 64 Kbytes of CCM (core coupled memory) data RAM
Application supply and I/Os: 1.8 V to 3.6 V
RTC oscillator: 32 kHz oscillator for RTC with calibration
Internal RC: Internal 32 kHz RC with calibration
Additional serial flash: 128Mb (16MB) serial flash memory chip
MicroMod flash storage: 16MB flash storage
Connector: M.2 MicroMod connector
UART: UART (Updated in V2.0)
I2C: Two I2C Buses
SPI: SPI Bus
Analog inputs: Two Dedicated Analog Inputs, 15 total analog input capable inputs
Digital I/O: Two Dedicated Digital I/O Pins
PWM: Two Dedicated PWM Pins, 24 total PWM capable
General purpose I/O: Nine General Purpose I/O Pins

A strong choice when you want STM32 performance in a MicroMod project while keeping the processor easy to swap between carrier boards.

Jargon buster

Plain-language definitions for the technical terms used above.

Bootloader: Small starter software on a microcontroller that lets new code be uploaded before the main program runs. Knowing how to enter bootloader mode matters when you need to program the board or recover it after a faulty sketch.
DFU: Device Firmware Update is a mode that lets you load new firmware onto a board over USB. It matters when recovering a board or installing firmware without using a separate programmer.
Flash memory: Non-volatile memory that keeps stored data even when power is removed. In this sensor, it matters because enrolled fingerprint templates can remain saved after the project is turned off.
FPU: A floating-point unit is hardware inside a processor that speeds up calculations with decimal numbers. This helps when projects use maths-heavy tasks such as motion sensing, filtering sensor readings, or audio processing.
I2C: I2C is a two-wire communication bus used by many sensors and small modules. It matters because several I2C devices can share the same two wires, but each device needs a compatible address and your controller must support I2C.
JTAG: JTAG is a hardware debugging and programming interface used to inspect and control chips at a low level. It matters for advanced development because it can help diagnose firmware problems that are hard to see through normal serial output.
M.2: A compact edge-connector format commonly used to plug small modules into a carrier board without soldering. On this product it is the physical connector used by the MicroMod system, so compatibility with the matching processor board is important.
microcontroller: A microcontroller is a small computer on a chip that runs your program and controls connected inputs and outputs. For this product, it is the part that reads buttons and sensors, drives the display and speaker, and communicates over Bluetooth.
MicroMod: A modular board system where a small processor board plugs into a separate carrier board that provides connectors, power, and peripherals. It matters because this carrier board needs a compatible MicroMod processor board before it can run your project code.
PWM: Pulse Width Modulation is a way for a digital pin to simulate variable output power by switching on and off very quickly. It matters for controlling things like LED brightness, motor speed, or servo-style signals from a microcontroller pin.
RAM: RAM is temporary memory used while a device is running, and its contents are lost when power is removed. A “Run in RAM” mode is useful for testing settings without permanently programming the module, but it may not support every feature.
RTC: A Real-Time Clock keeps track of time even when the main processor is asleep or powered down, usually with a small backup battery. It matters for data logging and tracking projects that need accurate timestamps.
SPI: A fast serial communication bus often used for displays, memory cards, and sensors. It matters because SPI devices need specific pins for clock and data, plus a separate chip-select line for each device.
SRAM: Fast temporary memory used by a processor while a program is running. More SRAM helps with projects that handle larger data buffers, networking, displays, or more complex code.
STM32: STM32 is a family of microcontroller chips commonly used in embedded electronics. Knowing a product uses an STM32 can help when looking at firmware updates, pin connections, or low-level serial control options.
SWD: Serial Wire Debug is a two-wire programming and debugging interface used with many microcontrollers. It matters if you need low-level access to program, recover or debug the processor board connected to this carrier.
UART: UART is a simple serial connection that sends data over separate transmit and receive wires, often labelled TX and RX. It matters because this module is designed to replace a wired UART cable with a wireless link while keeping the same serial data format.