Boardoza MicroSD Breakout Board

Compact SPI-based microSD breakout board for 3.3V and 5V systems.

The Boardoza MicroSD Breakout Board is a compact storage solution that enables microSD card interfacing via SPI communication protocol. This breakout board features an integrated voltage regulator that converts 5V input to 3.3V operation, ensuring safe and reliable communication with microSD cards while maintaining compatibility with both 3.3V and 5V microcontroller systems.

With its small form factor of 20mm x 40mm, this module provides an easy way to add mass storage capabilities to embedded projects, data logging applications, and IoT devices. The board is optimized for high-speed data transfer and features 3.3V tolerant SPI pins for seamless integration.

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Key Features

SPI Communication Interface: Standard SPI protocol for universal microcontroller compatibility.
Integrated Voltage Regulation: Converts 5V input to 3.3V operation for safe microSD card interfacing.
3.3V Tolerant I/O: All SPI pins are 3.3V tolerant, protecting the microSD card from overvoltage.
High-Speed Data Transfer: Optimized for fast read/write operations with microSD cards.
Compact Design: Small 20mm x 40mm form factor for space-constrained applications.
Wide Compatibility: Works with microSD and microSDHC cards up to 32GB.
Simple Integration: Standard SPI pinout for easy connection to Arduino, ESP32, STM32, and other platforms.

Technical Specifications

Input Voltage: 5V
Voltage Input Type: 6-pin 2.50mm header
Operating Voltage: 3.3V (regulated)
Interface: SPI (Serial Peripheral Interface)
Functions: MicroSD Card Reader/Writer Module
I/O Voltage Level: 3.3V tolerant
Supported Cards: MicroSD, MicroSDHC (up to 32GB)
Operating Temperature: -40°C ~ +85°C
Board Dimensions: 20mm x 40mm

Board Pinout

( J1 ) SPI Communication Pins

Pin Number	Pin Name	Description
1	MISO	Master Input Slave Output (3.3V tolerant)
2	SCK	Serial Clock (3.3V tolerant)
3	MOSI	Master Output Slave Input (3.3V tolerant)
4	CS	Chip Select (3.3V tolerant)
5	GND	Ground (0V reference)
6	+5V	Positive voltage input