Adafruit
Adafruit Micro SD SPI or SDIO Card Breakout Board - 3V ONLY!
The Adafruit Micro SD SPI or SDIO Card Breakout Board gives you fast microSD card access using either standard SPI or the higher-speed SDIO protocol. Unlike ...
The Adafruit Micro SD SPI or SDIO Card Breakout Board gives you fast microSD card access using either standard SPI or the higher-speed SDIO protocol. Unlike SPI-only breakouts, this board exposes the full SDIO bus with up to 4 data pins for significantly faster read/write speeds — roughly double the throughput compared to SPI on supported microcontrollers.
SDIO is ideal for projects that need to stream large files quickly, such as audio playback, video display, or high-frequency data logging. You can still use this board in SPI mode for simpler setups. Note that this board operates at 3.3V only — there are no level shifters or voltage regulators on board.
Key Features
- SPI + SDIO Support – Use standard SPI or faster multi-pin SDIO protocol
- Up to 4 Data Pins – SDIO mode provides significantly faster throughput than single-pin SPI
- MicroSD Card Slot – Standard push-push socket for microSD cards
- 3.3V Operation – Direct connection to 3.3V microcontrollers
- Breadboard Friendly – Includes header for easy prototyping
- Compact Breakout – Minimal footprint for embedding in projects
Ideal For
- High-speed data logging requiring fast write speeds
- Audio and video file streaming from microSD
- Projects that have outgrown SPI-only SD card speeds
- CircuitPython and Arduino projects on SDIO-capable microcontrollers
Package Contents
- 1× Adafruit Micro SD SPI/SDIO Breakout Board
- 1× Header pin strip
Resources
Jargon buster
Plain-language definitions for the technical terms used above.
- breakout
- A breakout is a small circuit board that makes a tiny or hard-to-solder component easier to connect to with standard pins. It matters because this OLED module can be wired into a microcontroller project without needing to solder directly to the display’s fine contacts.
- CircuitPython
- A beginner-friendly version of Python designed to run directly on microcontroller boards. If a product supports CircuitPython, you can often program it by copying code files onto the board rather than setting up a more complex toolchain.
- 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.
- microSD card
- A microSD card is a small removable memory card used to store files such as audio tracks. For this product, the card is where the sound files live, so its capacity and formatting can affect how many sounds you can use.
- 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.
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Brands
Prototyping & Wiring
Related Tutorials
Free guides on learn.littlebird.com.au
