{"product_id":"microsd-card-spi-sdio-castellated-breakout-board","title":"MicroSD Card SPI \/ SDIO Castellated Breakout Board","description":"\u003ch2\u003eWhat is it?\u003c\/h2\u003e\n\u003cp\u003eAdd high-capacity removable storage to your next embedded project with this compact\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eMicroSD Card Breakout Board\u003c\/strong\u003e. Designed with\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003ecastellated edge pads\u003c\/strong\u003e, the board can be easily soldered directly onto your PCB as a surface-mount module or used with standard headers for breadboard prototyping.\u003c\/p\u003e\n\u003cp\u003eUnlike many MicroSD breakouts that only expose the SPI interface, this board provides access to both\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eSPI\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eand\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eSDIO\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003esignals, allowing you to choose the interface that best fits your application. Use SPI for broad compatibility with virtually any microcontroller, or take advantage of SDIO for significantly higher data transfer speeds on supported devices such as STM32, ESP32, RP2040, and other modern MCUs.\u003c\/p\u003e\n\u003cp\u003eWhether you're logging sensor data, storing images, playing audio, or streaming files, this breakout offers a clean and reliable way to integrate MicroSD storage into space-constrained designs.\u003c\/p\u003e\n\u003ch2\u003eFeatures:\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eSupports both\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eSPI\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eand\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eSDIO\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003ecommunication interfaces\u003c\/li\u003e\n\u003cli\u003eCompact footprint with\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003ecastellated edge pads\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003efor direct PCB soldering\u003c\/li\u003e\n\u003cli\u003eCan also be used with standard pin headers for prototyping\u003c\/li\u003e\n\u003cli\u003eIdeal for embedded products, prototypes, and production designs\u003c\/li\u003e\n\u003cli\u003eClearly labeled pinout for straightforward integration\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eThe breakout board has the following pinouts:\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e3V3\u003c\/li\u003e\n\u003cli\u003eCLK\u003c\/li\u003e\n\u003cli\u003eD0 (DATA 0) \/ MISO\u003c\/li\u003e\n\u003cli\u003eD1 (DATA 1)\u003c\/li\u003e\n\u003cli\u003eD2 (DATA 2)\u003c\/li\u003e\n\u003cli\u003eCD (DATA 3)\u003c\/li\u003e\n\u003cli\u003eCMD \/ MOSI\u003c\/li\u003e\n\u003cli\u003eDET\u003c\/li\u003e\n\u003cli\u003eGND\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eIt can be used with open source Arduino Libraries such as:\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"https:\/\/github.com\/arduino-libraries\/SD\" rel=\"noopener\" target=\"_blank\"\u003eSD Library for Arduino\u003c\/a\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch2\u003eTypical Applications:\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eData logging\u003c\/li\u003e\n\u003cli\u003eAudio playback and recording\u003c\/li\u003e\n\u003cli\u003eImage and graphics storage\u003c\/li\u003e\n\u003cli\u003eFirmware updates and file management\u003c\/li\u003e\n\u003cli\u003eIoT edge devices\u003c\/li\u003e\n\u003cli\u003ePortable instruments\u003c\/li\u003e\n\u003cli\u003eRobotics and automation\u003c\/li\u003e\n\u003cli\u003eDIY electronics and maker projects\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWhy Castellated?\u003c\/h2\u003e\n\u003cp\u003eCastellated modules provide a professional, low-profile solution for integrating reusable circuitry into your own PCB. Simply place the module onto matching PCB footprints and solder along the edges—no bulky headers required. This makes the breakout equally suitable for rapid prototyping and permanent product integration.\u003c\/p\u003e\n\u003cp\u003eWhether you need the simplicity of SPI or the performance of SDIO, this breakout board gives you the flexibility to support both from a single compact module.\u003c\/p\u003e","brand":"Questwise Ventures","offers":[{"title":"Default Title","offer_id":54687384699159,"sku":null,"price":5.2,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0889\/7835\/8551\/files\/IMG_5576.jpg?v=1786759874","url":"https:\/\/www.questwiseventures.com\/products\/microsd-card-spi-sdio-castellated-breakout-board","provider":"Questwise Ventures","version":"1.0","type":"link"}