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<html><head><title>饮水思源精华区</title><Content-type: text/html; charset=gb2312><link rel=stylesheet type=text/css href="bbsdl.css"></head><table cellspacing=0 class=title width=90%><th class=title align=left width=20%>饮水思源站</th><th class=title align=center width=60%>文章阅读</th><th class=title align=right width=20%>精华区离线浏览</th></tr></table><hr><table align=center cellspacing=1 class=doc><tr><td>发信人:&nbsp;xozhao&nbsp;(XO),&nbsp;信区:&nbsp;DSP<br>标&nbsp;&nbsp;题:&nbsp;谈谈其他DSP(2)&nbsp;Motorola<br>发信站:&nbsp;饮水思源站&nbsp;(Sat&nbsp;Jun&nbsp;19&nbsp;12:57:51&nbsp;1999)&nbsp;,&nbsp;转信<br>DSP56009&nbsp;<br><br>应用:&nbsp;suitable&nbsp;for&nbsp;digital&nbsp;audio&nbsp;decompression&nbsp;functions,&nbsp;such&nbsp;as&nbsp;Dolby&nbsp;AC-3;&nbsp;Surround,&nbsp;MPEG1&nbsp;Layer&nbsp;2,&nbsp;and&nbsp;Digital&nbsp;Theater&nbsp;Systems&nbsp;(DTS),&nbsp;<br><br>特征:<br><br>Digital&nbsp;Signal&nbsp;Processing&nbsp;Core&nbsp;<br>-&nbsp;40MIPS;&nbsp;25&nbsp;ns&nbsp;instruction&nbsp;cycle&nbsp;at&nbsp;80&nbsp;MHz&nbsp;<br>-&nbsp;Two&nbsp;56-bit&nbsp;accumulators&nbsp;including&nbsp;extension&nbsp;byte&nbsp;<br>-&nbsp;Parallel&nbsp;24&nbsp;x&nbsp;24-bit&nbsp;multiply-accumulate&nbsp;in&nbsp;1&nbsp;instruction<br>&nbsp;&nbsp;&nbsp;cycle&nbsp;(2&nbsp;clock&nbsp;cycles)&nbsp;<br>-&nbsp;Double&nbsp;precision&nbsp;48&nbsp;x&nbsp;48-bit&nbsp;multiply&nbsp;with&nbsp;96-bit&nbsp;result&nbsp;in&nbsp;6&nbsp;instruction&nbsp;cycles&nbsp;<br>-&nbsp;56-bit&nbsp;addition/subtraction&nbsp;in&nbsp;one&nbsp;instruction&nbsp;cycle&nbsp;<br>-&nbsp;Fractional&nbsp;and&nbsp;integer&nbsp;arithmetic&nbsp;with&nbsp;support&nbsp;for&nbsp;multi-precision&nbsp;arithmetic&nbsp;<br>-&nbsp;Hardware&nbsp;support&nbsp;for&nbsp;block-floating&nbsp;point&nbsp;Fast&nbsp;Fourier&nbsp;Transforms&nbsp;(FFT)&nbsp;<br>-&nbsp;Hardware&nbsp;nested&nbsp;DO&nbsp;loops&nbsp;<br>-&nbsp;Zero-overhead&nbsp;fast&nbsp;interrupts&nbsp;(2&nbsp;instruction&nbsp;cycles)&nbsp;<br>-&nbsp;PLL-based&nbsp;clocking&nbsp;with&nbsp;a&nbsp;wide&nbsp;range&nbsp;of&nbsp;frequency&nbsp;multiplications&nbsp;(1&nbsp;to&nbsp;4096)&nbsp;and&nbsp;power&nbsp;saving&nbsp;clock&nbsp;divider&nbsp;<br>-&nbsp;Four&nbsp;24-bit&nbsp;internal&nbsp;data&nbsp;buses&nbsp;and&nbsp;three&nbsp;16-bit&nbsp;internal&nbsp;address&nbsp;buses&nbsp;for&nbsp;simultaneous&nbsp;accesses&nbsp;to&nbsp;one&nbsp;program&nbsp;and&nbsp;two&nbsp;data&nbsp;memories&nbsp;<br><br>Memory<br><br>10240&nbsp;x&nbsp;24-bit&nbsp;on-chip&nbsp;Program&nbsp;ROM*&nbsp;<br>4608&nbsp;x&nbsp;24-bit&nbsp;on-chip&nbsp;X-data&nbsp;RAM&nbsp;and&nbsp;3072&nbsp;x&nbsp;24-bit&nbsp;on-chip&nbsp;X-data&nbsp;ROM*&nbsp;<br>4352&nbsp;x&nbsp;24-bit&nbsp;on-chip&nbsp;Y-data&nbsp;RAM&nbsp;and&nbsp;1792&nbsp;x&nbsp;24-bit&nbsp;on-chip&nbsp;Y-data&nbsp;ROM*&nbsp;<br>512&nbsp;x&nbsp;24-bit&nbsp;on-chip&nbsp;Program&nbsp;RAM&nbsp;and&nbsp;64&nbsp;x&nbsp;24-bit&nbsp;bootstrap&nbsp;ROM&nbsp;<br>Up&nbsp;to&nbsp;2304&nbsp;x&nbsp;24-bit&nbsp;from&nbsp;X&nbsp;and&nbsp;Y&nbsp;data&nbsp;RAM&nbsp;can&nbsp;be&nbsp;switched&nbsp;to&nbsp;Program&nbsp;RAM&nbsp;giving&nbsp;a&nbsp;total&nbsp;of&nbsp;2816&nbsp;x&nbsp;24-bits&nbsp;of&nbsp;Program&nbsp;RAM&nbsp;<br>Bootstrap&nbsp;loading&nbsp;from&nbsp;Serial&nbsp;Host&nbsp;Interface&nbsp;or&nbsp;External&nbsp;Memory&nbsp;Interface&nbsp;<br><br><br>Peripheral&nbsp;and&nbsp;Support&nbsp;Circuits<br><br>----&nbsp;Serial&nbsp;Audio&nbsp;Interface&nbsp;(SAI)&nbsp;includes&nbsp;two&nbsp;receivers&nbsp;and&nbsp;three&nbsp;transmitters,&nbsp;master&nbsp;or&nbsp;slave&nbsp;capability,&nbsp;and&nbsp;implementation&nbsp;of&nbsp;I2S,&nbsp;Sony,&nbsp;and&nbsp;Matshushita&nbsp;audio&nbsp;protocols;&nbsp;<br>----&nbsp;two&nbsp;sets&nbsp;of&nbsp;SAI&nbsp;interrupt&nbsp;vectors&nbsp;<br>Serial&nbsp;Host&nbsp;Interface&nbsp;(SHI)&nbsp;features&nbsp;single&nbsp;master&nbsp;capability,&nbsp;10-word&nbsp;receive&nbsp;FIFO,&nbsp;and&nbsp;support&nbsp;for&nbsp;8-,&nbsp;16-&nbsp;and&nbsp;24-bit&nbsp;words&nbsp;<br>----&nbsp;External&nbsp;Memory&nbsp;Interface&nbsp;(EMI),&nbsp;implemented&nbsp;as&nbsp;a&nbsp;peripheral&nbsp;supporting&nbsp;<br>----&nbsp;Four&nbsp;dedicated,&nbsp;independent,&nbsp;programmable&nbsp;General&nbsp;Purpose&nbsp;I/O&nbsp;(GPIO)&nbsp;lines&nbsp;<br><br>80-pin&nbsp;plastic&nbsp;Quad&nbsp;Flat&nbsp;Pack&nbsp;surface-mount&nbsp;package;&nbsp;14&nbsp;x&nbsp;14&nbsp;x&nbsp;2.45&nbsp;mm;&nbsp;0.65&nbsp;mm&nbsp;lead&nbsp;pitch&nbsp;<br>&nbsp;<br><br>&nbsp;<br>--<br>※&nbsp;来源:·饮水思源站&nbsp;bbs.sjtu.edu.cn·[FROM:&nbsp;www-post@bbs]<br></tr></table><br><caption align=bottom><hr><table align=center cellspacing=1 class=foot><tr><td class=foot><a href="a-2.htm">返回</tr></table><p class=copyr align=center>Copyright &copy; 2001 <a class=copyr href="http://bbs.sjtu.edu.cn">SJTUBBS</a>, All Rights Reserved.<br><br>版权所有<a class=copyr href="telnet://bbs.sjtu.edu.cn">上海交大BBS饮水思源站</a></caption></body></html>
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