{"title":"Adafruit Micro SD SPI or SDIO Card Breakout Board - 3V ONLY!","handle":"adafruit-micro-sd-spi-or-sdio-card-breakout-board-3v-only","url":"/products/adafruit-micro-sd-spi-or-sdio-card-breakout-board-3v-only","description":"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.\n\nSDIO 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.\n\nKey Features\n\n\nSPI + SDIO Support – Use standard SPI or faster multi-pin SDIO protocol\n\nUp to 4 Data Pins – SDIO mode provides significantly faster throughput than single-pin SPI\n\nMicroSD Card Slot – Standard push-push socket for microSD cards\n\n3.3V Operation – Direct connection to 3.3V microcontrollers\n\nBreadboard Friendly – Includes header for easy prototyping\n\nCompact Breakout – Minimal footprint for embedding in projects\n\n\nIdeal For\n\nHigh-speed data logging requiring fast write speeds\nAudio and video file streaming from microSD\nProjects that have outgrown SPI-only SD card speeds\nCircuitPython and Arduino projects on SDIO-capable microcontrollers\n\n\nPackage Contents\n\n1× Adafruit Micro SD SPI/SDIO Breakout Board\n1× Header pin strip\n\n\n\nWarning: For use with 3.3V power and logic microcontrollers only! There is no level shifting or power regulation on this board. Not compatible with 5V microcontrollers. MicroSD card not included.\n\n\n\nNote: SDIO mode requires microcontroller hardware support and compatible firmware/library. Verify your microcontroller supports SDIO before purchasing for that purpose. SPI mode works with any SPI-capable 3.3V microcontroller.\n\n\nResources\n\nMicro SD Breakout Tutorial (Adafruit Learn)\n","vendor":"Adafruit","product_type":"physical","in_stock":true,"options":[],"variants":[{"id":4100,"title":"Default Title","sku":"AF-4682","price":7.08,"compare_at_price":0.0,"on_sale":false,"in_stock":true,"available_quantity":8,"option1":"Default Title"}]}