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版本 f4a84af96dc14b66ddafb355def9a12c85f2bf72

Secure digital input/output interface (SDIO)

Introduction

What is SDIO?

  • A SDIO (Secure Digital Input Output) card is an extension of the SD specification to cover I/O functions.
  • Host devices that support SDIO can use the SD slot to support:
    1. GPS receivers.
    2. digital cameras.
    3. RFID readers.
    4. FM radio tuners.
    5. TV tuners.
    6. Wi-Fi.
    7. Bluetooth.

Many other SDIO devices have been proposed, but it is now more common for I/O devices to connect using the USB interface. - SDIO cards support most of the memory commands of SD cards. SDIO cards can be structured as 8 logical cards, although currently, the typical way that an SDIO card uses this capability is to structure itself as one I/O card and one memory card.

.. image:: /sdio1.png .. image:: /sdio2.png

Difference of SD/MMC/SDIO

Speed class rating

Reference

  • Secure Digital wiki<http://en.wikipedia.org/wiki/Secure_Digital#SDIO>_
  • SDIO接口介绍<http://en.wikipedia.org/wiki/Secure_Digital#SDIO>_
  • Linux(open source)的 SD/MMC/SDIO 支援現況概要<http://www.jollen.org/blog/2007/01/open_source_sd_mmc_sdio.html>_
  • SD/MMC/SDIO概念區分<http://bbs.ednchina.com/BLOG_ARTICLE_198217.HTM>_
  • STM32 控制 SD 卡<http://www.360doc.com/content/12/0411/15/9707346_202767012.shtml>_
  • STM32 + SDIO + FATFS 文件系统 直讀 SD 卡<http://ntn314.blog.163.com/blog/static/16174358420112263456948/>_
  • 零死角玩轉 stm32 - 高級篇之 SDIO(4bit + DMA、支持SDHC、帶協議分析)<http://www.eeboard.com/tutorials/%E9%9B%B6%E6%AD%BB%E8%A7%92%E7%8E%A9%E8%BD%ACstm32-%E9%AB%98%E7%BA%A7%E7%AF%87%E4%B9%8Bsdio%EF%BC%884bit-dma%E3%80%81%E6%94%AF%E6%8C%81sdhc%E3%80%81%E5%B8%A6%E5%8D%8F%E8%AE%AE%E5%88%86%E6%9E%90/>_