📄 sd卡接口的完整规范（一）.htm
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<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''">特性：</SPAN><FONT
face="Times New Roman"> </FONT></P>
<P class=MsoNormal
style="MARGIN: 0cm 0cm 0pt 18pt; TEXT-INDENT: -18pt; mso-list: l0 level1 lfo1; tab-stops: list 18.0pt"><SPAN
lang=EN-US style="FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体"><SPAN
style="mso-list: Ignore">◎<SPAN
style="FONT: 7pt ''Times New Roman''"> <SPAN
style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-ascii-font-family: ''Times New Roman''; mso-hansi-font-family: ''Times New Roman''; mso-bidi-font-family: ''Times New Roman''; mso-bidi-font-size: 12.0pt; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">兼容</SPAN> </SPAN></SPAN></SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: ''Times New Roman''; mso-hansi-font-family: ''Times New Roman''">规范版本</SPAN><SPAN
lang=EN-US><FONT face="Times New Roman">1.01
</FONT></SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体">◎</SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: ''Times New Roman''; mso-hansi-font-family: ''Times New Roman''">卡上错误校正
</SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体">◎</SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: ''Times New Roman''; mso-hansi-font-family: ''Times New Roman''">支持</SPAN><SPAN
lang=EN-US><FONT face="Times New Roman">CPRM </FONT></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN
style="FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体">◎</SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: ''Times New Roman''; mso-hansi-font-family: ''Times New Roman''">两个可选的通信协议：</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''">模式和</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><FONT
face="Times New Roman"> </FONT></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN
style="FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体">◎</SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: ''Times New Roman''; mso-hansi-font-family: ''Times New Roman''">可变时钟频率</SPAN><SPAN
lang=EN-US><FONT face="Times New Roman">0</FONT></SPAN><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">25MHz </FONT></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN
style="FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体">◎</SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: ''Times New Roman''; mso-hansi-font-family: ''Times New Roman''">通信电压范围：</SPAN><SPAN
lang=EN-US><FONT face="Times New Roman">2.0-3.6V </FONT></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''">工作电压范围</SPAN><SPAN
lang=EN-US><FONT face="Times New Roman">:2.0-3.6V </FONT></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN
style="FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体">◎</SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: ''Times New Roman''; mso-hansi-font-family: ''Times New Roman''">低电压消耗：自动断电及自动睡醒,智能电源管理</SPAN><FONT
face="Times New Roman"> </FONT></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN
style="FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体">◎</SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: ''Times New Roman''; mso-hansi-font-family: ''Times New Roman''">无需额外编程电压
</SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体">◎</SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: ''Times New Roman''; mso-hansi-font-family: ''Times New Roman''">卡片带电插拔保护</SPAN><FONT
face="Times New Roman"> </FONT></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN
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