版本 21a16570a6b96b31b5c4dce1f354396b1543f51a
Changes from 21a16570a6b96b31b5c4dce1f354396b1543f51a to 556ba258175ff2b8ee920f6f7adbfd84b2798692
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title: SDIO
title: Secure digital input/output interface (SDIO)
categories: SDIO, STM32F4
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Your content here
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Introduction
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What is SDIO?
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- 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
Reference
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- `Secure Digital wiki<http://en.wikipedia.org/wiki/Secure_Digital#SDIO>`_
- `SDIO接口介绍<http://en.wikipedia.org/wiki/Secure_Digital#SDIO>`_
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