JAJSFD3G August 2016 – March 2019 DRA780 , DRA781 , DRA782 , DRA783 , DRA785 , DRA786 , DRA787 , DRA788
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The SDIO host controller provides an interface between a local host (LH) such as a microprocessor unit or digital signal processor and SDIO cards. It handles SDIO transactions with minimal LH intervention.
The SDIO host controller deals with SDIO protocol at transmission level, data packing, adding cyclic redundancy checks (CRCs), start/end bit, and checking for syntactical correctness.
The application interface can send every SDIO command and poll for the status of the adapter or wait for an interrupt request, which is sent back in case of exceptions or to warn of end of operation.
The application interface can read card responses or flag registers. It can also mask individual interrupt sources. All these operations can be performed by reading and writing control registers. The SDIO host controller also supports two slave DMA channels.
Compliance with standards:
Main features of the SD/SDIO host controllers:
The differences between the SDIO host controller and a standard SD host controller defined by the SD Card Specification, Part A2, SD Host Controller Standard Specification, v3.00 are:
For more information, see chapter SDIO Controller of the device TRM.