sd和mmc记忆卡介面技术基带.mht
来自「SD和MMC记忆卡介面技术基带。sd&mmc的基础说明。」· MHT 代码 · 共 1,389 行 · 第 1/5 页
MHT
1,389 行
<p class=3DMsoNormal style=3D'line-height:15.0pt;word-break:bre=
ak-all'><span
lang=3DEN-US style=3D'font-size:9.0pt;color:black'><!--[if gte =
vml 1]><v:shape
id=3D"_x0000_i1322" type=3D"#_x0000_t75" alt=3D"" style=3D'wid=
th:375pt;
height:189.75pt'>
<v:imagedata src=3D"file7222.files/image005.jpg" o:href=3D"htt=
p://www.52rd.com/upload/2006_8/File200682211215560483.jpg"/>
</v:shape><![endif]--><![if !vml]><img border=3D0 width=3D500
height=3D253 src=3D"file7222.files/image005.jpg" v:shapes=3D"_x=
0000_i1322"><![endif]><o:p></o:p></span></p>
</td>
</tr>
</table>
</div>
<p align=3Dcenter style=3D'text-align:center;line-height:15.0pt;
word-break:break-all'><span lang=3DEN-US style=3D'font-size:9.0pt;
color:black'><br>
<br>
表二:SD<span class=3DGramE>匯流=
5490;介面</span>的<span
class=3DGramE>脚位说明</span><br>
 <o:p></o:p></span></p>
<div align=3Dcenter>
<table class=3DMsoNormalTable border=3D0 cellspacing=3D1 cellpadd=
ing=3D0
style=3D'mso-cellspacing:.7pt'>
<tr style=3D'mso-yfti-irow:0;mso-yfti-lastrow:yes'>
<td style=3D'padding:.75pt .75pt .75pt .75pt'>
<p class=3DMsoNormal style=3D'line-height:15.0pt;word-break:bre=
ak-all'><span
lang=3DEN-US style=3D'font-size:9.0pt;color:black'><!--[if gte =
vml 1]><v:shape
id=3D"_x0000_i1323" type=3D"#_x0000_t75" alt=3D"" style=3D'wid=
th:375pt;
height:161.25pt'>
<v:imagedata src=3D"file7222.files/image006.jpg" o:href=3D"htt=
p://www.52rd.com/upload/2006_8/File200682211224527193.jpg"/>
</v:shape><![endif]--><![if !vml]><img border=3D0 width=3D500
height=3D215 src=3D"file7222.files/image006.jpg" v:shapes=3D"_x=
0000_i1323"><![endif]><o:p></o:p></span></p>
</td>
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</table>
</div>
<p align=3Dcenter style=3D'text-align:center;line-height:15.0pt;
word-break:break-all'><span lang=3DEN-US style=3D'font-size:9.0pt;
color:black'><br>
<br>
图三:MMC<span class=3DGramE>匯流&#=
25490;的</span>连接方式<br>
 <o:p></o:p></span></p>
<div align=3Dcenter>
<table class=3DMsoNormalTable border=3D0 cellspacing=3D1 cellpadd=
ing=3D0
style=3D'mso-cellspacing:.7pt'>
<tr style=3D'mso-yfti-irow:0;mso-yfti-lastrow:yes'>
<td style=3D'padding:.75pt .75pt .75pt .75pt'>
<p class=3DMsoNormal style=3D'line-height:15.0pt;word-break:bre=
ak-all'><span
lang=3DEN-US style=3D'font-size:9.0pt;color:black'><!--[if gte =
vml 1]><v:shape
id=3D"_x0000_i1324" type=3D"#_x0000_t75" alt=3D"" style=3D'wid=
th:274.5pt;
height:175.5pt'>
<v:imagedata src=3D"file7222.files/image007.jpg" o:href=3D"htt=
p://www.52rd.com/upload/2006_8/File200682211234292309.jpg"/>
</v:shape><![endif]--><![if !vml]><img border=3D0 width=3D366
height=3D234 src=3D"file7222.files/image007.jpg" v:shapes=3D"_x=
0000_i1324"><![endif]><o:p></o:p></span></p>
</td>
</tr>
</table>
</div>
<p align=3Dcenter style=3D'text-align:center;line-height:15.0pt;
word-break:break-all'><span lang=3DEN-US style=3D'font-size:9.0pt;
color:black'><br>
<br>
图四:SD<span class=3DGramE>匯流=
5490;的</span>连接方式<br>
 <o:p></o:p></span></p>
<div align=3Dcenter>
<table class=3DMsoNormalTable border=3D0 cellspacing=3D1 cellpadd=
ing=3D0
style=3D'mso-cellspacing:.7pt'>
<tr style=3D'mso-yfti-irow:0;mso-yfti-lastrow:yes'>
<td style=3D'padding:.75pt .75pt .75pt .75pt'>
<p class=3DMsoNormal style=3D'line-height:15.0pt;word-break:bre=
ak-all'><span
lang=3DEN-US style=3D'font-size:9.0pt;color:black'><!--[if gte =
vml 1]><v:shape
id=3D"_x0000_i1325" type=3D"#_x0000_t75" alt=3D"" style=3D'wid=
th:375pt;
height:201pt'>
<v:imagedata src=3D"file7222.files/image008.jpg" o:href=3D"htt=
p://www.52rd.com/upload/2006_8/File200682211241374725.jpg"/>
</v:shape><![endif]--><![if !vml]><img border=3D0 width=3D500
height=3D268 src=3D"file7222.files/image008.jpg" v:shapes=3D"_x=
0000_i1325"><![endif]><o:p></o:p></span></p>
</td>
</tr>
</table>
</div>
<p align=3Dcenter style=3D'text-align:center;line-height:15.0pt;
word-break:break-all'><span lang=3DEN-US style=3D'font-size:9.0pt;
color:black'><br>
<br>
图五:MMC和SD一起被=
351;用时的连接方式<br>
 <o:p></o:p></span></p>
</td>
</tr>
<tr style=3D'mso-yfti-irow:2;height:30.0pt'>
<td width=3D690 style=3D'width:517.5pt;padding:3.75pt 3.75pt 3.75=
pt 3.75pt;
height:30.0pt'>
<p class=3DMsoNormal align=3Dcenter style=3D'text-align:center;li=
ne-height:
15.0pt;word-break:break-all'><span lang=3DEN-US style=3D'font-siz=
e:9.0pt;
color:black'> <o:p></o:p></span></p>
</td>
</tr>
<tr style=3D'mso-yfti-irow:3'>
<td width=3D690 style=3D'width:517.5pt;background:whitesmoke;padd=
ing:
3.75pt 3.75pt 3.75pt 3.75pt'>
<p class=3DMsoNormal style=3D'line-height:15.0pt;word-break:break=
-all'><span
lang=3DEN-US style=3D'font-size:9.0pt;color:black'><!--[if gte vm=
l 1]><v:shape
id=3D"_x0000_i1326" type=3D"#_x0000_t75" alt=3D"" style=3D'width=
:7.5pt;
height:18.75pt'>
<v:imagedata src=3D"file7222.files/image002.gif" o:href=3D"http:=
//www.eedesign.com.tw/article/94event/0503_newstyle/e-img-1.gif"/>
</v:shape><![endif]--><![if !vml]><img border=3D0 width=3D10 heig=
ht=3D25
src=3D"file7222.files/image002.gif" v:shapes=3D"_x0000_i1326"><![=
endif]><span
class=3Dmidheadline><span style=3D'font-family:SimSun;mso-bidi-fo=
nt-family:
SimSun'>MMC的「命令—回应=
;」作业</span></span><br>
重置之后,MCI是关໾=
1;的,透过MCI控制暂存ࢤ=
0;的位元设定,可以将M=
CI开启。假设MCI_CMDR是控制&=
#21629;令<span
class=3DGramE>讯息</span>的暂存=
120;,它被设定的各栏<span
class=3DGramE>位值如</span>附表=
977;所示;ALL_SEND_CID是一个命=
0196;名称,它要求所有௚=
0;MMC记忆卡送出它们自।=
9;的CID号码,如附表四௚=
0;说明。在本范例中,A=
LL_SEND_CID<span
class=3DGramE>的引数</span>(argumentA=
289;<span
class=3DGramE>栏位之</span>内容=
159;储存在另一个暂存器=
;(MCI_ARGR)中。要传送ALL_SEND_C=
ID命令,<span
class=3DGramE>韧体工程师</span>=
517;须执行下列步骤:<br>
.将ALL_SEND_CID的引数值â=
35;入MCI_ARGR暂存器中。<br>
.设定命令暂存器&=
#65288;MCI_CMDR)。
<o:p></o:p></span></p>
<p style=3D'line-height:15.0pt;word-break:break-all'><span
style=3D'font-size:9.0pt;color:black'>命令暂=
3384;器被写入<span
class=3DGramE>值之后</span>,<span lang=
=3DEN-US>ALL_SEND_CID命令就会立即ඪ=
7;送出。当传送完成之&=
#21518;,状态暂存器(MCI_SRᦀ=
9;的状态位元会生效(a=
ssert)。ALL_SEND_CID需要回应,&#=
36825;可以透过读取MCI回应&#=
26242;存器里的值来达成z=
90;根据命令的需要,回=
应信息的大小可以在48&=
#20301;元至136位元之间。MCIߩ=
0;在这些信息中加入<span
class=3DGramE>侦</span>错码,以&=
450;止在传输中发生资料=
;毁损。<br>
 <o:p></o:p></span></span></p>
<div align=3Dcenter>
<table class=3DMsoNormalTable border=3D0 cellspacing=3D1 cellpadd=
ing=3D0
style=3D'mso-cellspacing:.7pt'>
<tr style=3D'mso-yfti-irow:0;mso-yfti-lastrow:yes'>
<td style=3D'padding:.75pt .75pt .75pt .75pt'>
<p class=3DMsoNormal style=3D'line-height:15.0pt;word-break:bre=
ak-all'><span
lang=3DEN-US style=3D'font-size:9.0pt;color:black'><!--[if gte =
vml 1]><v:shape
id=3D"_x0000_i1327" type=3D"#_x0000_t75" alt=3D"" style=3D'wid=
th:375pt;
height:141.75pt'>
<v:imagedata src=3D"file7222.files/image009.jpg" o:href=3D"htt=
p://www.52rd.com/upload/2006_8/File200682211252526698.jpg"/>
</v:shape><![endif]--><![if !vml]><img border=3D0 width=3D500
height=3D189 src=3D"file7222.files/image009.jpg" v:shapes=3D"_x=
0000_i1327"><![endif]><o:p></o:p></span></p>
</td>
</tr>
</table>
</div>
<p align=3Dcenter style=3D'text-align:center;line-height:15.0pt;
word-break:break-all'><span lang=3DEN-US style=3D'font-size:9.0pt;
color:black'><br>
<br>
<span class=3DGramE>表三</span>:MCI_CMDRੀ=
2;存器<br>
 <o:p></o:p></span></p>
<div align=3Dcenter>
<table class=3DMsoNormalTable border=3D0 cellspacing=3D1 cellpadd=
ing=3D0
style=3D'mso-cellspacing:.7pt'>
<tr style=3D'mso-yfti-irow:0;mso-yfti-lastrow:yes'>
<td style=3D'padding:.75pt .75pt .75pt .75pt'>
<p class=3DMsoNormal style=3D'line-height:15.0pt;word-break:bre=
ak-all'><span
lang=3DEN-US style=3D'font-size:9.0pt;color:black'><!--[if gte =
vml 1]><v:shape
id=3D"_x0000_i1328" type=3D"#_x0000_t75" alt=3D"" style=3D'wid=
th:375pt;
height:55.5pt'>
<v:imagedata src=3D"file7222.files/image010.jpg" o:href=3D"htt=
p://www.52rd.com/upload/2006_8/File200682211255048100.jpg"/>
</v:shape><![endif]--><![if !vml]><img border=3D0 width=3D500
height=3D74 src=3D"file7222.files/image010.jpg" v:shapes=3D"_x0=
000_i1328"><![endif]><o:p></o:p></span></p>
</td>
</tr>
</table>
</div>
<p align=3Dcenter style=3D'text-align:center;line-height:15.0pt;
word-break:break-all'><span lang=3DEN-US style=3D'font-size:9.0pt;
color:black'><br>
<br>
表四:ALL_SEND_CID命令<br>
 <o:p></o:p></span></p>
</td>
</tr>
<tr style=3D'mso-yfti-irow:4;height:30.0pt'>
<td width=3D690 style=3D'width:517.5pt;padding:3.75pt 3.75pt 3.75=
pt 3.75pt;
height:30.0pt'>
<p class=3DMsoNormal align=3Dcenter style=3D'text-align:center;li=
ne-height:
15.0pt;word-break:break-all'><span lang=3DEN-US style=3D'font-siz=
e:9.0pt;
color:black'> <o:p></o:p></span></p>
</td>
</tr>
<tr style=3D'mso-yfti-irow:5'>
<td width=3D690 style=3D'width:517.5pt;background:whitesmoke;padd=
ing:
3.75pt 3.75pt 3.75pt 3.75pt'>
<p class=3DMsoNormal style=3D'line-height:15.0pt;word-break:break=
-all'><span
lang=3DEN-US style=3D'font-size:9.0pt;color:black'><!--[if gte vm=
l 1]><v:shape
id=3D"_x0000_i1329" type=3D"#_x0000_t75" alt=3D"" style=3D'width=
:7.5pt;
height:18.75pt'>
<v:imagedata src=3D"file7222.files/image002.gif" o:href=3D"http:=
//www.eedesign.com.tw/article/94event/0503_newstyle/e-img-1.gif"/>
</v:shape><![endif]--><![if !vml]><img border=3D0 width=3D10 heig=
ht=3D25
src=3D"file7222.files/image002.gif" v:shapes=3D"_x0000_i1329"><![=
endif]><span
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