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62 them. When it detects an SD card, the SD card initialization protocol is loaded. |
62 them. When it detects an SD card, the SD card initialization protocol is loaded. |
63 The initialization protocol is a sequence of commands as described in the <xref href="http://www.sdcard.org/developers/tech/sdcard/pls/Simplified_Physical_Layer_Spec.pdf" scope="external">SD Association</xref> specification. </p> </section> |
63 The initialization protocol is a sequence of commands as described in the <xref href="http://www.sdcard.org/developers/tech/sdcard/pls/Simplified_Physical_Layer_Spec.pdf" scope="external">SD Association</xref> specification. </p> </section> |
64 <section id="GUID-0EA05AC0-557D-573F-B907-41752445DC60"><title>SD controller |
64 <section id="GUID-0EA05AC0-557D-573F-B907-41752445DC60"><title>SD controller |
65 classes</title> <fig id="GUID-F044A820-5E7E-5A99-83D5-7CA47EBABBC8"> |
65 classes</title> <fig id="GUID-F044A820-5E7E-5A99-83D5-7CA47EBABBC8"> |
66 <title> SD controller classes </title> |
66 <title> SD controller classes </title> |
67 <image href="GUID-58A5C008-88B6-5C91-8BE5-E98CA5E5A438_d0e411582_href.png" placement="inline"/> |
67 <image href="GUID-58A5C008-88B6-5C91-8BE5-E98CA5E5A438_d0e400148_href.png" placement="inline"/> |
68 </fig> </section> |
68 </fig> </section> |
69 <section id="GUID-25A29720-A91E-49FA-8E60-3060F25536EA"><title>SD Stack </title><p>The SD controller is implemented through |
69 <section id="GUID-25A29720-A91E-49FA-8E60-3060F25536EA"><title>SD Stack </title><p>The SD controller is implemented through |
70 a set of classes derived from the MMC controller. The <xref href="GUID-3DC34D4F-E693-3BF0-B5D6-DF22FCE37340.dita"><apiname>DMMCStack</apiname></xref> maintains |
70 a set of classes derived from the MMC controller. The <xref href="GUID-3DC34D4F-E693-3BF0-B5D6-DF22FCE37340.dita"><apiname>DMMCStack</apiname></xref> maintains |
71 a state machine and is responsible for detecting the new cards and initializing |
71 a state machine and is responsible for detecting the new cards and initializing |
72 the necessary stack. The <xref href="GUID-3DC34D4F-E693-3BF0-B5D6-DF22FCE37340.dita"><apiname>DSDStack</apiname></xref> is |
72 the necessary stack. The <xref href="GUID-3DC34D4F-E693-3BF0-B5D6-DF22FCE37340.dita"><apiname>DSDStack</apiname></xref> is |