sd卡接口的完整规范（一）.htm

SD卡接口的完整规范和AVR的SD卡接口程序

      <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN 
      style="FONT-FAMILY: 宋体; mso-ascii-font-family: ''Times New Roman''; mso-hansi-font-family: ''Times New Roman''">编程电压卡内生成。</SPAN><FONT 
      face="Times New Roman"> </FONT></P>
      <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US><FONT 
      face="Times New Roman">SD</FONT></SPAN><SPAN 
      style="FONT-FAMILY: 宋体; mso-ascii-font-family: ''Times New Roman''; mso-hansi-font-family: ''Times New Roman''">卡支持第二接口工作模式</SPAN><SPAN 
      lang=EN-US><FONT face="Times New Roman">SPI</FONT></SPAN><SPAN 
      style="FONT-FAMILY: 宋体; mso-ascii-font-family: ''Times New Roman''; mso-hansi-font-family: ''Times New Roman''">。</SPAN></P>
      <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN 
      style="FONT-FAMILY: 宋体; mso-ascii-font-family: ''Times New Roman''; mso-hansi-font-family: ''Times New Roman''">如果接到复位命令（</SPAN><SPAN 
      lang=EN-US><FONT face="Times New Roman">CMD0</FONT></SPAN><SPAN 
      style="FONT-FAMILY: 宋体; mso-ascii-font-family: ''Times New Roman''; mso-hansi-font-family: ''Times New Roman''">）时,</SPAN><SPAN 
      lang=EN-US><FONT face="Times New Roman">CS</FONT></SPAN><SPAN 
      style="FONT-FAMILY: 宋体; mso-ascii-font-family: ''Times New Roman''; mso-hansi-font-family: ''Times New Roman''">信号有效（低电平）,</SPAN><SPAN 
      lang=EN-US><FONT face="Times New Roman">SPI</FONT></SPAN><SPAN 
      style="FONT-FAMILY: 宋体; mso-ascii-font-family: ''Times New Roman''; mso-hansi-font-family: ''Times New Roman''">模式启用。</SPAN></P>
      <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN 
      style="FONT-FAMILY: 宋体; mso-ascii-font-family: ''Times New Roman''; mso-hansi-font-family: ''Times New Roman''">（译者按：以下部分为本人翻译）</SPAN></P>
      <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN 
      style="FONT-FAMILY: 宋体; mso-ascii-font-family: ''Times New Roman''; mso-hansi-font-family: ''Times New Roman''">接口</SPAN></P>
      <P class=MsoNormal 
      style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0"><SPAN 
      style="FONT-FAMILY: 宋体; mso-ascii-font-family: ''Times New Roman''; mso-hansi-font-family: ''Times New Roman''">该</SPAN><SPAN 
      lang=EN-US><FONT face="Times New Roman">SD</FONT></SPAN><SPAN 
      style="FONT-FAMILY: 宋体; mso-ascii-font-family: ''Times New Roman''; mso-hansi-font-family: ''Times New Roman''">卡的接口可以支持两种操作模式：</SPAN></P>
      <P class=MsoNormal 
      style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0"><SPAN 
      style="FONT-FAMILY: 宋体; mso-ascii-font-family: ''Times New Roman''; mso-hansi-font-family: ''Times New Roman''">。</SPAN><SPAN 
      lang=EN-US><FONT face="Times New Roman">SD</FONT></SPAN><SPAN 
      style="FONT-FAMILY: 宋体; mso-ascii-font-family: ''Times New Roman''; mso-hansi-font-family: ''Times New Roman''">卡模式</SPAN></P>
      <P class=MsoNormal 
      style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0"><SPAN 
      style="FONT-FAMILY: 宋体; mso-ascii-font-family: ''Times New Roman''; mso-hansi-font-family: ''Times New Roman''">。</SPAN><SPAN 
      lang=EN-US><FONT face="Times New Roman">SPI</FONT></SPAN><SPAN 
      style="FONT-FAMILY: 宋体; mso-ascii-font-family: ''Times New Roman''; mso-hansi-font-family: ''Times New Roman''">模式</SPAN></P>
      <P class=MsoNormal 
      style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0"><SPAN 
      style="FONT-FAMILY: 宋体; mso-ascii-font-family: ''Times New Roman''; mso-hansi-font-family: ''Times New Roman''">主机系统可以选择以上其中任一模式,</SPAN><SPAN 
      lang=EN-US><FONT face="Times New Roman">SD</FONT></SPAN><SPAN 
      style="FONT-FAMILY: 宋体; mso-ascii-font-family: ''Times New Roman''; mso-hansi-font-family: ''Times New Roman''">卡模式允许</SPAN><SPAN 
      lang=EN-US><FONT face="Times New Roman">4</FONT></SPAN><SPAN 
      style="FONT-FAMILY: 宋体; mso-ascii-font-family: ''Times New Roman''; mso-hansi-font-family: ''Times New Roman''">线的高速数据传输。</SPAN><SPAN 
      lang=EN-US><FONT face="Times New Roman"> SPI</FONT></SPAN><SPAN 
      style="FONT-FAMILY: 宋体; mso-ascii-font-family: ''Times New Roman''; mso-hansi-font-family: ''Times New Roman''">模式允许简单通用的</SPAN><SPAN 
      lang=EN-US><FONT face="Times New Roman">SPI</FONT></SPAN><SPAN 
      style="FONT-FAMILY: 宋体; mso-ascii-font-family: ''Times New Roman''; mso-hansi-font-family: ''Times New Roman''">通道接口,</SPAN><FONT 
      face="Times New Roman"> </FONT><SPAN 
      style="FONT-FAMILY: 宋体; mso-ascii-font-family: ''Times New Roman''; mso-hansi-font-family: ''Times New Roman''">这种模式相对于</SPAN><SPAN 
      lang=EN-US><FONT face="Times New Roman">SD</FONT></SPAN><SPAN 
      style="FONT-FAMILY: 宋体; mso-ascii-font-family: ''Times New Roman''; mso-hansi-font-family: ''Times New Roman''">模式的不足之处是丧失了速度。</SPAN></P>
      <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US><FONT 
      face="Times New Roman">SD</FONT></SPAN><SPAN 
      style="FONT-FAMILY: 宋体; mso-ascii-font-family: ''Times New Roman''; mso-hansi-font-family: ''Times New Roman''">卡模式针脚定义</SPAN></P>
      <P class=MsoNormal 
      style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0"><SPAN 
      lang=EN-US><o:p><FONT 
face="Times New Roman">&nbsp;</FONT></o:p></SPAN></P>
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        <TBODY>
        <TR style="mso-yfti-irow: 0">
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          style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: windowtext 1pt solid; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: windowtext 1pt solid; WIDTH: 106.5pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt" 
          vAlign=top width=142>
            <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN 
            style="FONT-FAMILY: 宋体; mso-ascii-font-family: ''Times New Roman''; mso-hansi-font-family: ''Times New Roman''">针脚</SPAN></P></TD>
          <TD 
          style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: windowtext 1pt solid; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #d4d0c8; WIDTH: 106.5pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt" 
          vAlign=top width=142>
            <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN 
            style="FONT-FAMILY: 宋体; mso-ascii-font-family: ''Times New Roman''; mso-hansi-font-family: ''Times New Roman''">名称</SPAN></P></TD>
          <TD 
          style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: windowtext 1pt solid; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #d4d0c8; WIDTH: 106.55pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt" 
          vAlign=top width=142>
            <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN 
            style="FONT-FAMILY: 宋体; mso-ascii-font-family: ''Times New Roman''; mso-hansi-font-family: ''Times New Roman''">类型</SPAN></P></TD>
          <TD 
          style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: windowtext 1pt solid; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #d4d0c8; WIDTH: 106.55pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt" 
          vAlign=top width=142>
            <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN 
            style="FONT-FAMILY: 宋体; mso-ascii-font-family: ''Times New Roman''; mso-hansi-font-family: ''Times New Roman''">描述</SPAN></P></TD></TR>
        <TR style="mso-yfti-irow: 1">
          <TD 
          style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #d4d0c8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: windowtext 1pt solid; WIDTH: 106.5pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt" 
          vAlign=top width=142>
            <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN 
            lang=EN-US><FONT face="Times New Roman">1</FONT></SPAN></P></TD>
          <TD 
          style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #d4d0c8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #d4d0c8; WIDTH: 106.5pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt" 
          vAlign=top width=142>
            <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN 
            lang=EN-US><FONT face="Times New Roman">CD DAT3</FONT></SPAN></P></TD>
          <TD 
          style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #d4d0c8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #d4d0c8; WIDTH: 106.55pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt" 
          vAlign=top width=142>
            <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN 
            lang=EN-US><FONT face="Times New Roman">I/O/PP</FONT></SPAN></P></TD>
          <TD 
          style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #d4d0c8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #d4d0c8; WIDTH: 106.55pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt" 
          vAlign=top width=142>
            <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN 
            style="FONT-FAMILY: 宋体; mso-ascii-font-family: ''Times New Roman''; mso-hansi-font-family: ''Times New Roman''">卡监测数据位</SPAN><SPAN 
            lang=EN-US><FONT face="Times New Roman">3</FONT></SPAN></P></TD></TR>
        <TR style="mso-yfti-irow: 2">
          <TD 
          style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #d4d0c8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: windowtext 1pt solid; WIDTH: 106.5pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt" 
          vAlign=top width=142>
            <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN 
            lang=EN-US><FONT face="Times New Roman">2</FONT></SPAN></P></TD>
          <TD 
          style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #d4d0c8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #d4d0c8; WIDTH: 106.5pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt" 
          vAlign=top width=142>
            <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN 
            lang=EN-US><FONT face="Times New Roman">CMD</FONT></SPAN></P></TD>
          <TD 
          style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #d4d0c8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #d4d0c8; WIDTH: 106.55pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt" 
          vAlign=top width=142>
            <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN 
            lang=EN-US><FONT face="Times New Roman">PP</FONT></SPAN></P></TD>
          <TD 
          style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #d4d0c8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #d4d0c8; WIDTH: 106.55pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt" 
          vAlign=top width=142>
            <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN 
            style="FONT-FAMILY: 宋体; mso-ascii-font-family: ''Times New Roman''; mso-hansi-font-family: ''Times New Roman''">命令</SPAN><SPAN 
            lang=EN-US><FONT face="Times New Roman">/</FONT></SPAN><SPAN 
            style="FONT-FAMILY: 宋体; mso-ascii-font-family: ''Times New Roman''; mso-hansi-font-family: ''Times New Roman''">回复</SPAN></P></TD></TR>
        <TR style="mso-yfti-irow: 3">
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          style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #d4d0c8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: windowtext 1pt solid; WIDTH: 106.5pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt" 
          vAlign=top width=142>
            <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN 
            lang=EN-US><FONT face="Times New Roman">3</FONT></SPAN></P></TD>
          <TD 
          style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #d4d0c8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #d4d0c8; WIDTH: 106.5pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt" 
          vAlign=top width=142>
            <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN 
            lang=EN-US><FONT face="Times New Roman">Vss</FONT></SPAN></P></TD>
          <TD 
          style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #d4d0c8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #d4d0c8; WIDTH: 106.55pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt" 
          vAlign=top width=142>
            <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN 
            lang=EN-US><FONT face="Times New Roman">S</FONT></SPAN></P></TD>
          <TD 
          style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #d4d0c8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #d4d0c8; WIDTH: 106.55pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt" 
          vAlign=top width=142>
            <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN 
            style="FONT-FAMILY: 宋体; mso-ascii-font-family: ''Times New Roman''; mso-hansi-font-family: ''Times New Roman''">地</SPAN></P></TD></TR>
        <TR style="mso-yfti-irow: 4">
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