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<link href="/image.php?url=https://csdnimg.cn/release/download_crawler_static/css/base.min.css" rel="stylesheet"/><link href="/image.php?url=https://csdnimg.cn/release/download_crawler_static/css/fancy.min.css" rel="stylesheet"/><link href="/image.php?url=https://csdnimg.cn/release/download_crawler_static/89549330/raw.css" rel="stylesheet"/><div id="sidebar" style="display: none"><div id="outline"></div></div><div class="pf w0 h0" data-page-no="1" id="pf1"><div class="pc pc1 w0 h0"><img alt="" class="bi x0 y0 w1 h1" src="/image.php?url=https://csdnimg.cn/release/download_crawler_static/89549330/bg1.jpg"/><div class="t m0 x1 h2 y1 ff1 fs0 fc0 sc0 ls0 ws0">JEDEC SOLID ST<span class="_ _0"></span>A<span class="_ _0"></span>TE TECH<span class="ls1 ws1">NOLOGY ASSOCIA<span class="_ _0"></span>TION</span></div><div class="t m0 x2 h3 y2 ff1 fs1 fc0 sc0 ls2 ws2">JESD79-2E</div><div class="t m0 x2 h4 y3 ff1 fs2 fc0 sc0 ls3 ws3">April 2008</div><div class="t m0 x1 h5 y4 ff1 fs3 fc0 sc0 ls4 ws2">JEDEC</div><div class="t m0 x1 h5 y5 ff1 fs3 fc0 sc0 ls5 ws2">ST<span class="_ _1"></span>ANDARD</div><div class="t m0 x3 h3 y6 ff1 fs1 fc0 sc0 ls6 ws4">DDR2 SDRAM SPECIFICA<span class="_ _2"></span>TION</div><div class="t m0 x2 h2 y7 ff1 fs0 fc0 sc0 ls7 ws5">(Revision of JESD79-2D)</div></div><div class="pi" data-data='{"ctm":[1.568627,0.000000,0.000000,1.568627,0.000000,0.000000]}'></div></div><div id="pf2" class="pf w0 h0" data-page-no="2"><div class="pc pc2 w0 h0"><img class="bi x0 y0 w1 h1" alt="" src="/image.php?url=https://csdnimg.cn/release/download_crawler_static/89549330/bg2.jpg"><div class="t m0 x4 h2 y8 ff1 fs0 fc0 sc0 ls8 ws2">NOTICE</div><div class="t m0 x5 h6 y9 ff2 fs2 fc0 sc0 ls9 ws6">JEDEC standards and publications contain material that has been prepared, reviewed, and </div><div class="t m0 x6 h6 ya ff2 fs2 fc0 sc0 ls3 ws3">approved through the JEDEC Board of Directors le<span class="lsa ws7">vel and subsequently re</span>viewed and approved </div><div class="t m0 x7 h6 yb ff2 fs2 fc0 sc0 ls9 ws6">by the JEDEC legal Counsel.</div><div class="t m0 x8 h6 yc ff2 fs2 fc0 sc0 ls5 ws8">JEDEC standards and publications <span class="ws2">are designed to serve the public<span class="ls3 ws3"> interest through eliminating </span></span></div><div class="t m0 x9 h6 yd ff2 fs2 fc0 sc0 ls3 ws3">misunderstandings between manufac<span class="lsb ws9">turers and purchasers, facilit</span>ating interchangeability and </div><div class="t m0 x8 h6 ye ff2 fs2 fc0 sc0 ls3 ws3">improvement of products, and assi<span class="ls9 ws6">sting the purchaser in select<span class="lsc wsa">ing and obtaining with minimum </span></span></div><div class="t m0 xa h6 yf ff2 fs2 fc0 sc0 lsd wsb">delay the proper product for use by <span class="ls9 wsc">those other than JEDEC members,<span class="lse"> whether the standard is to </span></span></div><div class="t m0 xb h6 y10 ff2 fs2 fc0 sc0 ls5 ws8">be used either domestical<span class="ls3 ws3">ly or internationally<span class="_ _0"></span>.</span></div><div class="t m0 xc h6 y11 ff2 fs2 fc0 sc0 ls3 ws3">JEDEC standards and publications <span class="lsb wsd">are adopted without regard to <span class="ls9 ws6">whether or not their adoption </span></span></div><div class="t m0 xa h6 y12 ff2 fs2 fc0 sc0 ls9 wse">may involve patents or articles, <span class="ls2 wsf">materials, or processes. By <span class="ls3 ws10">such action JEDEC does not assume </span></span></div><div class="t m0 x6 h6 y13 ff2 fs2 fc0 sc0 ls5 ws11">any liability to any patent owner<span class="_ _3"></span>,<span class="ls3 ws3"> nor does it assume any obligation whatever to parties adopting </span></div><div class="t m0 xd h6 y14 ff2 fs2 fc0 sc0 ls3 ws3">the JEDEC standards or publications.</div><div class="t m0 xe h6 y15 ff2 fs2 fc0 sc0 lsc wsa">The information included in JEDEC standards a<span class="ls9 ws6">nd publications represents a sound approach to </span></div><div class="t m0 xf h6 y16 ff2 fs2 fc0 sc0 lse ws12">product specification and application, principall<span class="lsb ws13">y from the solid stat<span class="ls5 ws2">e device manufacturer </span></span></div><div class="t m0 x8 h6 y17 ff2 fs2 fc0 sc0 lsc wsa">viewpoint. W<span class="_ _3"></span>ithin the JEDEC organization, there <span class="lsf ws14">are procedures whereby <span class="ls5 ws2">a JEDEC standard or </span></span></div><div class="t m0 x10 h6 y18 ff2 fs2 fc0 sc0 ls9 ws6">publication m<span class="ff3">a</span>y be further processed and <span class="ls3 ws3">ultimately become an ANSI standard.</span></div><div class="t m0 x11 h6 y19 ff2 fs2 fc0 sc0 lsd ws15">No claims to be in conformance <span class="lse">with this standard may be made <span class="lsb ws16">unless all requirements stated in </span></span></div><div class="t m0 x12 h6 y1a ff2 fs2 fc0 sc0 ls10 wsf">the standard are met.</div><div class="t m0 x13 h6 y1b ff2 fs2 fc0 sc0 ls9 ws6">Inquiries, comments, and suggestions relative to the content of this JEDEC standard or </div><div class="t m0 xf h6 y1c ff2 fs2 fc0 sc0 ls3 ws3">publication should be addressed <span class="ls9 ws6">to JEDEC at the address be<span class="lsc wsa">low<span class="_ _0"></span>, or call (703) 907-7559 or </span></span></div><div class="t m0 x14 h6 y1d ff2 fs2 fc0 sc0 ls2 ws2">www<span class="_ _3"></span>.jedec.or<span class="_ _3"></span>g.</div><div class="t m0 x15 h6 y1e ff2 fs2 fc0 sc0 lse ws12">Published by</div><div class="t m0 x16 h6 y1f ff2 fs2 fc0 sc0 lse ws12">&#169;JEDEC Solid State T<span class="_ _0"></span>echnology Association 2008</div><div class="t m0 x17 h6 y20 ff2 fs2 fc0 sc0 ls5 ws2">2500 W<span class="_ _3"></span>ilson Boulevard</div><div class="t m0 x18 h6 y21 ff2 fs2 fc0 sc0 lsc wsa">Arlington, V<span class="_ _4"></span>A 22201-3834</div><div class="t m0 x19 h6 y22 ff2 fs2 fc0 sc0 ls9 ws6">This document may be downloaded free of<span class="lsc wsa"> charge, however JEDEC retains the </span></div><div class="t m0 x1a h6 y23 ff2 fs2 fc0 sc0 ls3 ws17">copyright on this material. <span class="ls9 ws6">By downloading this file th<span class="ls5 ws2">e individual agrees not to </span></span></div><div class="t m0 x1b h6 y24 ff2 fs2 fc0 sc0 ls3 ws3">charge for or resell the resulting material.</div><div class="t m0 x1c h4 y25 ff1 fs2 fc0 sc0 ls3 ws3">Price: Please r<span class="_ _5"></span>efer to the current </div><div class="t m0 x1d h4 y26 ff1 fs2 fc0 sc0 lsc wsa">Catalog of JEDEC Engineering S<span class="_ _3"></span>tandards and Publications online at</div><div class="t m0 x1e h4 y27 ff1 fs2 fc0 sc0 ls3 ws2">http://www<span class="_ _3"></span>.jedec.org/<span class="lsc">Catalog/catalog.cfm</span></div><div class="t m0 x12 h6 y28 ff2 fs2 fc0 sc0 ls10 wsf">Printed in the U.S.A.</div><div class="t m0 x1f h6 y29 ff2 fs2 fc0 sc0 ls10 ws18">All rights reserved</div></div><div class="pi" data-data='{"ctm":[1.568627,0.000000,0.000000,1.568627,0.000000,0.000000]}'></div></div><div id="pf3" class="pf w0 h0" data-page-no="3"><div class="pc pc3 w0 h0"><img class="bi x0 y0 w1 h1" alt="" src="/image.php?url=https://csdnimg.cn/release/download_crawler_static/89549330/bg3.jpg"><div class="c x20 y2a w2 h7"><div class="t m0 x21 h8 y2b ff2 fs4 fc0 sc0 ls5 ws2"> </div><div class="t m0 x21 h8 y2c ff2 fs4 fc1 sc0 ls5 ws2"> </div><div class="t m0 x21 h8 y2d ff2 fs4 fc1 sc0 ls5 ws2"> </div><div class="t m0 x21 h8 y2e ff2 fs4 fc1 sc0 ls5 ws2"> </div><div class="t m0 x21 h8 y2f ff2 fs4 fc1 sc0 ls5 ws2"> </div><div class="t m0 x21 h9 y30 ff4 fs4 fc1 sc0 ls5 ws2"> </div><div class="t m0 x21 h9 y31 ff4 fs4 fc1 sc0 ls5 ws2"> </div><div class="t m0 x21 h9 y32 ff4 fs4 fc1 sc0 ls5 ws2"> </div><div class="t m0 x21 h8 y33 ff2 fs4 fc1 sc0 ls5 ws2"> </div><div class="t m0 x22 h8 y34 ff2 fs4 fc1 sc0 ls11 ws2">PLEA<span class="_ _6"></span>SE!<span class="_ _3"></span> </div><div class="t m0 x0 h8 y35 ff2 fs4 fc1 sc0 ls5 ws2"> </div><div class="t m0 x0 h8 y36 ff2 fs4 fc1 sc0 ls5 ws2"> </div><div class="t m0 x23 h8 y37 ff2 fs4 fc1 sc0 ls12 ws19">DON&#8217;<span class="_ _0"></span>T<span class="_ _3"></span> VI<span class="_ _0"></span>OL<span class="_ _3"></span>AT<span class="_ _3"></span>E </div><div class="t m0 x24 h8 y38 ff2 fs4 fc1 sc0 ls13 ws2">TH<span class="_ _6"></span>E </div><div class="t m0 x1c h8 y39 ff2 fs4 fc1 sc0 ls14 ws2">LA<span class="_ _7"></span>W<span class="_ _8"> </span>!<span class="_ _3"></span> </div><div class="t m0 x0 h8 y3a ff2 fs4 fc1 sc0 ls5 ws2"> </div><div class="t m0 x0 h8 y3b ff2 fs4 fc1 sc0 ls5 ws2"> </div><div class="t m0 x0 h8 y3c ff2 fs4 fc1 sc0 ls5 ws2"> </div><div class="t m0 x25 h8 y3d ff2 fs4 fc1 sc0 ls15 ws1a">T<span class="_ _6"></span>hi<span class="_ _3"></span>s<span class="_ _3"></span> docum<span class="_ _7"></span>ent<span class="_ _0"></span> i<span class="_ _3"></span>s c<span class="_ _3"></span>opy<span class="_ _3"></span>r<span class="_ _5"></span>i<span class="_ _3"></span>gh<span class="_ _5"></span>t<span class="_ _3"></span>e<span class="_ _5"></span>d by<span class="_ _3"></span> t<span class="_ _3"></span>he El<span class="_ _3"></span>ec<span class="_ _3"></span>t<span class="_ _3"></span>r<span class="_ _3"></span>oni<span class="_ _3"></span>c<span class="_ _3"></span> I<span class="_ _3"></span>ndus<span class="_ _3"></span>t<span class="_ _3"></span>r<span class="_ _3"></span>i<span class="_ _3"></span>es<span class="_ _3"></span> A<span class="_ _7"></span>l<span class="_ _3"></span>l<span class="_ _3"></span>i<span class="_ _3"></span>a<span class="_ _3"></span>nce <span class="_ _3"></span>and m<span class="_ _7"></span>ay<span class="_ _3"></span> not<span class="_ _3"></span> be<span class="_ _3"></span> </div><div class="t m0 x26 h8 y3e ff2 fs4 fc1 sc0 ls15 ws1a">r<span class="_ _3"></span>epr<span class="_ _3"></span>oduc<span class="_ _3"></span>ed w<span class="_ _6"></span>i<span class="_ _3"></span>t<span class="_ _3"></span>hout<span class="_ _3"></span> pe<span class="_ _3"></span>r<span class="_ _3"></span>m<span class="_ _9"></span>i<span class="_ _3"></span>s<span class="_ _3"></span>si<span class="_ _3"></span>on.<span class="_ _0"></span> </div><div class="t m0 x0 h8 y3f ff2 fs4 fc1 sc0 ls5 ws2"> </div><div class="t m0 x27 h8 y40 ff2 fs4 fc1 sc0 ls15 ws1a">O<span class="_ _7"></span>r<span class="_ _3"></span>ga<span class="_ _3"></span>ni<span class="_ _3"></span>zat<span class="_ _0"></span>i<span class="_ _3"></span>ons m<span class="_ _7"></span>ay<span class="_ _3"></span> obt<span class="_ _0"></span>ai<span class="_ _3"></span>n pe<span class="_ _3"></span>rm<span class="_ _6"></span>i<span class="_ _3"></span>ss<span class="_ _3"></span>i<span class="_ _3"></span>on t<span class="_ _3"></span>o r<span class="_ _3"></span>e<span class="_ _3"></span>pr<span class="_ _5"></span>oduc<span class="_ _3"></span>e a l<span class="_ _0"></span>i<span class="_ _3"></span>m<span class="_ _9"></span>i<span class="_ _3"></span>t<span class="_ _3"></span>e<span class="_ _3"></span>d num<span class="_ _9"></span>be<span class="_ _3"></span>r<span class="_ _3"></span> of<span class="_ _3"></span> copi<span class="_ _3"></span>e<span class="_ _3"></span>s </div><div class="t m0 x28 h8 y41 ff2 fs4 fc1 sc0 ls16 ws1b">th<span class="_ _7"></span>ro<span class="_ _7"></span>u<span class="_ _7"></span>g<span class="_ _7"></span>h<span class="_ _7"></span> e<span class="_ _6"></span>n<span class="_ _7"></span>te<span class="_ _7"></span>rin<span class="_ _7"></span>g<span class="_ _7"></span> in<span class="_ _7"></span>to<span class="_ _7"></span> a<span class="_ _7"></span> lic<span class="_ _6"></span>e<span class="_ _7"></span>n<span class="_ _6"></span>s<span class="_ _7"></span>e<span class="_ _6"></span> a<span class="_ _6"></span>g<span class="_ _7"></span>re<span class="_ _7"></span>e<span class="_ _6"></span>m<span class="_ _8"> </span>e<span class="_ _7"></span>n<span class="_ _7"></span>t. F<span class="_ _7"></span>o<span class="_ _7"></span>r in<span class="_ _7"></span>f<span class="_ _6"></span>o<span class="_ _7"></span>rm<span class="_ _8"> </span>a<span class="_ _7"></span>tio<span class="_ _7"></span>n<span class="_ _7"></span>, c<span class="_ _6"></span>o<span class="_ _7"></span>n<span class="_ _7"></span>ta<span class="_ _7"></span>c<span class="_ _6"></span>t: </div><div class="t m0 x0 h8 y42 ff2 fs4 fc1 sc0 ls5 ws2"> </div><div class="t m0 x0 h8 y43 ff2 fs4 fc1 sc0 ls5 ws2"> </div><div class="t m0 x0 h8 y44 ff2 fs4 fc1 sc0 ls5 ws2"> </div><div class="t m0 x29 h8 y45 ff2 fs4 fc1 sc0 ls15 ws1a">JED<span class="_ _7"></span>E<span class="_ _6"></span>C<span class="_ _6"></span> S<span class="_ _6"></span>ol<span class="_ _3"></span>i<span class="_ _3"></span>d St<span class="_ _3"></span>at<span class="_ _3"></span>e<span class="_ _3"></span> T<span class="_ _6"></span>ec<span class="_ _3"></span>hnol<span class="_ _3"></span>ogy<span class="_ _3"></span> A<span class="_ _7"></span>s<span class="_ _3"></span>soc<span class="_ _3"></span>i<span class="_ _3"></span>at<span class="_ _3"></span>i<span class="_ _3"></span>on </div><div class="t m0 x2a h8 y46 ff2 fs4 fc1 sc0 ls15 ws1a">2500 W<span class="_ _9"></span>i<span class="_ _3"></span>l<span class="_ _3"></span>son Boul<span class="_ _3"></span>eva<span class="_ _3"></span>r<span class="_ _3"></span>d </div><div class="t m0 x2b h8 y47 ff2 fs4 fc1 sc0 ls15 ws1a">A<span class="_ _7"></span>r<span class="_ _3"></span>l<span class="_ _3"></span>i<span class="_ _3"></span>ng<span class="_ _5"></span>t<span class="_ _3"></span>on,<span class="_ _0"></span> V<span class="_ _7"></span>i<span class="_ _3"></span>r<span class="_ _3"></span>gi<span class="_ _3"></span>ni<span class="_ _3"></span>a<span class="_ _3"></span> 22201-<span class="_ _3"></span>3834 </div><div class="t m0 x2c h8 y48 ff2 fs4 fc1 sc0 ls15 ws1a">or<span class="_ _3"></span> c<span class="_ _5"></span>al<span class="_ _0"></span>l<span class="_ _3"></span> (<span class="_ _3"></span>703)<span class="_ _3"></span> 907-<span class="_ _3"></span>7559 </div><div class="t m0 x0 h8 y49 ff2 fs4 fc1 sc0 ls5 ws2"> </div><div class="t m0 x0 h8 y4a ff2 fs4 fc1 sc0 ls5 ws2"> </div><div class="t m0 x0 h8 y4b ff2 fs4 fc1 sc0 ls5 ws2"> </div><div class="t m0 x0 h8 y4c ff2 fs4 fc1 sc0 ls5 ws2"> </div><div class="t m0 x0 h8 y4d ff2 fs4 fc1 sc0 ls5 ws2"> </div><div class="t m0 x0 h8 y4e ff2 fs4 fc1 sc0 ls5 ws2"> </div><div class="t m0 x0 h8 y4f ff2 fs4 fc1 sc0 ls5 ws2"> </div><div class="t m0 x0 h8 y50 ff2 fs4 fc1 sc0 ls5 ws2"> </div><div class="t m0 x0 h8 y51 ff2 fs4 fc1 sc0 ls5 ws2"> </div><div class="t m0 x0 h8 y52 ff2 fs4 fc1 sc0 ls5 ws2"> </div><div class="t m0 x0 h8 y53 ff2 fs4 fc1 sc0 ls5 ws2"> </div></div></div><div class="pi" data-data='{"ctm":[1.568627,0.000000,0.000000,1.568627,0.000000,0.000000]}'></div></div><div id="pf4" class="pf w0 h0" data-page-no="4"><div class="pc pc4 w0 h0"><img class="bi x0 y0 w1 h1" alt="" src="/image.php?url=https://csdnimg.cn/release/download_crawler_static/89549330/bg4.jpg"></div><div class="pi" data-data='{"ctm":[1.568627,0.000000,0.000000,1.568627,0.000000,0.000000]}'></div></div><div id="pf5" class="pf w0 h0" data-page-no="5"><div class="pc pc5 w0 h0"><img class="bi x0 y0 w1 h1" alt="" src="/image.php?url=https://csdnimg.cn/release/download_crawler_static/89549330/bg5.jpg"><div class="t m0 x2d ha y54 ff2 fs5 fc0 sc0 ls17 ws1c">JEDEC Standard No. 79<span class="_ _6"></span>-2E</div><div class="t m0 x2e h2 y55 ff1 fs0 fc0 sc0 ls1 ws2">Contents</div><div class="t m0 xa hb y56 ff5 fs5 fc0 sc0 ls18 ws1d">1<span class="_ _a"> </span>Scope ...........<span class="_ _6"></span>................<span class="_ _6"></span>................<span class="_ _6"></span>.............<span class="_ _6"></span>................<span class="_ _6"></span>.............<span class="_ _6"></span>................<span class="_ _6"></span>.............<span class="_ _6"></span>......<span class="ws2">.......................<span class="_ _6"></span>..<span class="_ _b"> </span>1</span></div><div class="t m0 xa hb y57 ff5 fs5 fc0 sc0 ls19 ws1e">2<span class="_ _a"> </span>Package ballout &amp; addressing <span class="_ _9"></span>.............<span class="_ _6"></span>...................<span class="_ _6"></span>................<span class="_ _6"></span>...................<span class="_ _6"></span>.................<span class="_ _6"></span>.............<span class="ls1a ws2">...<span class="_ _6"></span>.....<span class="_ _b"> </span>2</span></div><div class="t m0 xa hc y58 ff4 fs5 fc0 sc0 ls19 ws1e">2.1<span class="_ _c"> </span>DDR2 SDRAM package ballout <span class="_ _b"> </span>..........................<span class="_ _6"></span>...................<span class="_ _6"></span>................<span class="_ _6"></span>....................<span class="_ _6"></span>................<span class="_ _6"></span><span class="ls1a ws2">.....<span class="_ _b"> </span>2</span></div><div class="t m0 xa hc y59 ff4 fs5 fc0 sc0 ls1b ws2">2.2<span class="_ _c"> </span>Quad-stacked/quad<span class="ls1c ws1f">-die DDR2 SDRAM internal rank associ<span class="ls1a ws20">at<span class="_ _6"></span>ions ..............<span class="_ _6"></span>.............<span class="_ _6"></span>................<span class="_ _6"></span>...<span class="_ _b"> </span>11</span></span></div><div class="t m0 xa hc y5a ff4 fs5 fc0 sc0 ls1d ws21">2.3<span class="_ _c"> </span>Input/output functional description <span class="_ _d"> </span>...............<span class="_ _6"></span>.............<span class="_ _6"></span>................<span class="_ _6"></span>.............<span class="_ _6"></span>................<span class="_ _6"></span>...............<span class="ls1e ws2">........<span class="_ _d"> </span>13</span></div><div class="t m0 xa hc y5b ff4 fs5 fc0 sc0 ls1d ws22">2.4<span class="_ _c"> </span>DDR2 SDRAM addressing <span class="_ _6"></span>.<span class="_ _6"></span>.................<span class="_ _6"></span>............<span class="_ _6"></span>.................<span class="_ _6"></span>.............<span class="_ _6"></span>................<span class="_ _6"></span>.............<span class="_ _6"></span>.............<span class="ls1e ws2">......<span class="_ _b"> </span>14</span></div><div class="t m0 xa hb y5c ff5 fs5 fc0 sc0 ls1f ws23">3<span class="_ _a"> </span>Functional description <span class="_ _e"> </span>............<span class="ls20 ws2">................................................................................<span class="ls21">...........<span class="ls22">.....<span class="_ _6"></span>.......<span class="_ _b"> </span>16</span></span></span></div><div class="t m0 xa hc y5d ff4 fs5 fc0 sc0 ls19 ws1e">3.1<span class="_ _c"> </span>Simplified state diagram <span class="_ _6"></span>.........<span class="_ _6"></span>...................<span class="_ _6"></span>................<span class="_ _6"></span>....................<span class="_ _6"></span>................<span class="_ _6"></span>...................<span class="_ _6"></span><span class="ls22 ws2">.............<span class="_ _b"> </span>16</span></div><div class="t m0 xa hc y5e ff4 fs5 fc0 sc0 ls23 ws24">3.2<span class="_ _c"> </span>Basic functionality <span class="_ _d"> </span>........<span class="_ _6"></span>................<span class="_ _6"></span>................<span class="_ _6"></span>.............<span class="_ _6"></span>................<span class="_ _6"></span>.............<span class="_ _6"></span>................<span class="_ _6"></span>......<span class="ls24 ws2">.................<span class="_ _b"> </span>16</span></div><div class="t m0 xa hc y5f ff4 fs5 fc0 sc0 ls23 ws25">3.3<span class="_ _c"> </span>Power-up and initialization <span class="_ _b"> </span>........................<span class="_ _6"></span>.............<span class="_ _6"></span>................<span class="_ _6"></span>.............<span class="_ _6"></span>................<span class="_ _6"></span>.............<span class="_ _6"></span>.<span class="ls22 ws2">............<span class="_ _b"> </span>16</span></div><div class="t m0 xa hc y60 ff4 fs5 fc0 sc0 ls1d ws22">3.3.1<span class="_ _f"> </span>Power-up and initializ<span class="_ _6"></span>ation sequence <span class="_ _d"> </span>..............<span class="_ _6"></span>................<span class="_ _6"></span>.............<span class="_ _6"></span>................<span class="_ _6"></span>.............<span class="_ _6"></span>.............<span class="ls25 ws2">...<span class="_ _b"> </span>17</span></div><div class="t m0 xa hc y61 ff4 fs5 fc0 sc0 ls21 ws26">3.4<span class="_ _c"> </span>Programming the mode and ex<span class="ls19 ws1e">tended mode registers <span class="_ _8"> </span>..........................<span class="_ _6"></span>................<span class="_ _6"></span>....................<span class="_ _6"></span>...<span class="_ _b"> </span>18</span></div><div class="t m0 xa hc y62 ff4 fs5 fc0 sc0 ls26 ws27">3.4.1<span class="_ _f"> </span>DDR2 SDRAM mode register (MR) <span class="_ _b"> </span>.................<span class="ls1a ws2">.........<span class="_ _6"></span>.............<span class="_ _6"></span>................<span class="_ _6"></span>.................<span class="_ _6"></span>............<span class="_ _6"></span>.......<span class="_ _b"> </span>1<span class="ls5">8</span></span></div><div class="t m0 xa hc y63 ff4 fs5 fc0 sc0 ls5 ws28">3.4.2<span class="_ _f"> </span>DDR2 SDRAM extended mode registers (EMR(#)) <span class="_ _6"></span>...............<span class="_ _6"></span>....................<span class="_ _6"></span>................<span class="_ _6"></span>................<span class="_ _b"> </span>19</div><div class="t m0 xa hc y64 ff4 fs5 fc0 sc0 ls27 ws29">3.4.3<span class="_ _f"> </span>Off-chip driver (OCD) impedance adjustment <span class="_ _7"></span>..................<span class="_ _6"></span>...................<span class="_ _6"></span>................<span class="_ _6"></span>....................<span class="_ _6"></span>...<span class="_ _b"> </span>24</div><div class="t m0 xa hc y65 ff4 fs5 fc0 sc0 ls28 ws2a">3.4.4<span class="_ _f"> </span>ODT (on-die termination) <span class="_ _8"> </span>....................<span class="_ _6"></span>...<span class="ls1a ws2">.............<span class="_ _6"></span>................<span class="_ _6"></span>.............<span class="_ _6"></span>................<span class="_ _6"></span>.............<span class="_ _6"></span>...<span class="ls22">..........<span class="_ _b"> </span>27</span></span></div><div class="t m0 xa hc y66 ff4 fs5 fc0 sc0 ls17 ws2b">3.4.5<span class="_ _f"> </span>ODT related timings <span class="_ _7"></span>.....<span class="_ _6"></span>.............<span class="_ _6"></span>................<span class="_ _6"></span>.............<span class="_ _6"></span>................<span class="_ _6"></span>.............<span class="_ _6"></span>................<span class="_ _6"></span>..........<span class="ls22 ws2">.............<span class="_ _b"> </span>27</span></div><div class="t m0 xa hc y67 ff4 fs5 fc0 sc0 ls17 ws2b">3.5<span class="_ _c"> </span>Bank activate command <span class="_ _6"></span>............<span class="_ _6"></span>.............<span class="_ _6"></span>................<span class="_ _6"></span>................<span class="_ _6"></span>.............<span class="_ _6"></span>................<span class="_ _6"></span>.............<span class="_ _6"></span>...<span class="ls22 ws2">..........<span class="_ _b"> </span>32</span></div><div class="t m0 xa hc y68 ff4 fs5 fc0 sc0 ls19 ws1e">3.6<span class="_ _c"> </span>Read and write access modes <span class="_ _9"></span>............<span class="_ _6"></span>................<span class="_ _6"></span>...................<span class="_ _6"></span>................<span class="_ _6"></span>....................<span class="_ _6"></span>.............<span class="ls1e ws2">...<span class="_ _6"></span>...<span class="_ _b"> </span>32</span></div><div class="t m0 xa hc y69 ff4 fs5 fc0 sc0 ls18 ws2c">3.6.1<span class="_ _f"> </span>Posted CAS <span class="_ _d"> </span>..............<span class="_ _6"></span>................<span class="_ _6"></span>.............<span class="_ _6"></span>................<span class="_ _6"></span>.............<span class="_ _6"></span>................<span class="_ _6"></span>................<span class="_ _6"></span>.......<span class="ls24 ws2">................<span class="_ _b"> </span>32</span></div><div class="t m0 xa hc y6a ff4 fs5 fc0 sc0 ls17 ws2b">3.6.2<span class="_ _f"> </span>Burst mode operation <span class="_ _e"> </span>............<span class="_ _6"></span>................<span class="_ _6"></span>.............<span class="_ _6"></span>................<span class="_ _6"></span>.............<span class="_ _6"></span>................<span class="_ _6"></span>...............<span class="ls22 ws2">...........<span class="_ _d"> </span>34</span></div><div class="t m0 xa hc y6b ff4 fs5 fc0 sc0 ls17 ws2b">3.6.3<span class="_ _f"> </span>Burst read command <span class="_ _e"> </span>.............<span class="_ _6"></span>................<span class="_ _6"></span>................<span class="_ _6"></span>.............<span class="_ _6"></span>................<span class="_ _6"></span>.............<span class="_ _6"></span>................<span class="ls22 ws2">..........<span class="_ _d"> </span>34</span></div><div class="t m0 xa hc y6c ff4 fs5 fc0 sc0 ls23 ws25">3.6.4<span class="_ _f"> </span>Burst write operation <span class="_ _7"></span>.<span class="_ _6"></span>.............<span class="_ _6"></span>................<span class="_ _6"></span>................<span class="_ _6"></span>.............<span class="_ _6"></span>................<span class="_ _6"></span>.............<span class="_ _6"></span>............<span class="ls22 ws2">..............<span class="_ _d"> </span>37</span></div><div class="t m0 xa hc y6d ff4 fs5 fc0 sc0 ls18 ws2d">3.6.5<span class="_ _f"> </span>Write data mask <span class="_ _7"></span>.<span class="_ _6"></span>.............<span class="_ _6"></span>.................<span class="_ _6"></span>............<span class="_ _6"></span>.................<span class="_ _6"></span>................<span class="_ _6"></span>.............<span class="_ _6"></span>................<span class="_ _6"></span>.<span class="ls24 ws2">...............<span class="_ _b"> </span>40</span></div><div class="t m0 xa hc y6e ff4 fs5 fc0 sc0 ls29 ws2e">3.7<span class="_ _c"> </span>Precharge operation <span class="_"> </span>.......<span class="ls1a ws2">................<span class="_ _6"></span>................<span class="_ _6"></span>.............<span class="_ _6"></span>.................<span class="_ _6"></span>............<span class="_ _6"></span>.................<span class="_ _6"></span>......<span class="ls22">.............<span class="_ _b"> </span>41</span></span></div><div class="t m0 xa hc y6f ff4 fs5 fc0 sc0 ls2a ws2f">3.7.1<span class="_ _f"> </span>Burst read operation followe<span class="ls23 ws24">d by prec<span class="_ _6"></span>harge <span class="_ _8"> </span>..........<span class="_ _6"></span>................<span class="_ _6"></span>.............<span class="_ _6"></span>................<span class="_ _6"></span>................<span class="_ _6"></span>.......<span class="_ _b"> </span>4<span class="ls5 ws2">2</span></span></div><div class="t m0 xa hc y70 ff4 fs5 fc0 sc0 ls19 ws30">3.7.2<span class="_ _f"> </span>Burst write followed by precharge .......<span class="_ _6"></span>................<span class="_ _6"></span>...................<span class="_ _6"></span>................<span class="_ _6"></span>....................<span class="_ _6"></span>..........<span class="ls1e ws2">...<span class="_ _6"></span>...<span class="_ _b"> </span>44</span></div><div class="t m0 xa hc y71 ff4 fs5 fc0 sc0 ls23 ws25">3.8<span class="_ _c"> </span>Auto precharge operation <span class="_"> </span>.........................<span class="_ _6"></span>................<span class="_ _6"></span>................<span class="_ _6"></span>.............<span class="_ _6"></span>................<span class="_ _6"></span>.............<span class="ls22 ws2">.......<span class="_ _6"></span>...<span class="_ _b"> </span>45</span></div><div class="t m0 xa hc y72 ff4 fs5 fc0 sc0 ls2a ws2f">3.8.1<span class="_ _f"> </span>Burst read with auto prec<span class="ls18 ws31">harge ........<span class="_ _6"></span>............<span class="_ _6"></span>.................<span class="_ _6"></span>.............<span class="_ _6"></span>................<span class="_ _6"></span>................<span class="_ _6"></span>.........<span class="ls1e ws2">.......<span class="_ _b"> </span>46</span></span></div><div class="t m0 xa hc y73 ff4 fs5 fc0 sc0 ls1d ws21">3.8.2<span class="_ _f"> </span>Burst write with auto precharge <span class="_ _b"> </span>...<span class="_ _6"></span>................<span class="_ _6"></span>.............<span class="_ _6"></span>.................<span class="_ _6"></span>............<span class="_ _6"></span>.................<span class="_ _6"></span>............<span class="ls1e ws2">.......<span class="_ _b"> </span>48</span></div><div class="t m0 xa hc y74 ff4 fs5 fc0 sc0 ls23 ws24">3.9<span class="_ _c"> </span>Refresh command <span class="_ _6"></span>.....<span class="_ _6"></span>................<span class="_ _6"></span>.............<span class="_ _6"></span>................<span class="_ _6"></span>.............<span class="_ _6"></span>................<span class="_ _6"></span>................<span class="_ _6"></span>.............<span class="ls22 ws2">..........<span class="_ _6"></span>...<span class="_ _b"> </span>49</span></div><div class="t m0 xa hc y75 ff4 fs5 fc0 sc0 ls17 ws32">3.10<span class="_ _10"> </span>Self refresh operation <span class="_ _7"></span>................<span class="_ _6"></span>................<span class="_ _6"></span>.............<span class="_ _6"></span>................<span class="_ _6"></span>................<span class="_ _6"></span>.............<span class="_ _6"></span>..........<span class="ls24 ws2">................<span class="_ _b"> </span>50</span></div><div class="t m0 xa hc y76 ff4 fs5 fc0 sc0 ls18 ws33">3.11<span class="_ _10"> </span>Power-down .......<span class="_ _6"></span>.............<span class="_ _6"></span>................<span class="_ _6"></span>.............<span class="_ _6"></span>................<span class="_ _6"></span>.............<span class="_ _6"></span>................<span class="_ _6"></span>.................<span class="_ _6"></span>.<span class="ls24 ws2">..................<span class="_ _b"> </span>51</span></div><div class="t m0 xa hc y77 ff4 fs5 fc0 sc0 ls19 ws1e">3.12<span class="_ _10"> </span>Asynchronous CKE LOW event <span class="_ _9"></span>......<span class="_ _6"></span>................<span class="_ _6"></span>....................<span class="_ _6"></span>................<span class="_ _6"></span>...................<span class="_ _6"></span>................<span class="_ _6"></span>...<span class="ls25 ws2">....<span class="_ _b"> </span>55</span></div><div class="t m0 xa hc y78 ff4 fs5 fc0 sc0 ls2a ws2f">3.13<span class="_ _10"> </span>Input clock frequency change <span class="ls5 ws34">during precharge pow<span class="_ _6"></span>er down <span class="_ _6"></span>.......<span class="_ _6"></span>................<span class="_ _6"></span>...................<span class="_ _6"></span>.............<span class="_ _b"> </span>56</span></div><div class="t m0 xa hc y79 ff4 fs5 fc0 sc0 ls19 ws1e">3.14<span class="_ _10"> </span>SSC (Spread Spectrum Clocking) <span class="_"> </span>...............<span class="_ _6"></span>....................<span class="_ _6"></span>................<span class="_ _6"></span>...................<span class="_ _6"></span>................<span class="_ _6"></span>......<span class="ls25 ws2">....<span class="_ _b"> </span>57</span></div><div class="t m0 xa hc y7a ff4 fs5 fc0 sc0 ls1d ws22">3.14.1<span class="_ _11"> </span>Terms and definitions <span class="_"> </span>.........................<span class="_ _6"></span>.............<span class="_ _6"></span>................<span class="_ _6"></span>................<span class="_ _6"></span>.............<span class="_ _6"></span>................<span class="ls22 ws2">.............<span class="_ _d"> </span>57</span></div><div class="t m0 xa hc y7b ff4 fs5 fc0 sc0 ls21 ws26">3.14.2<span class="_ _11"> </span>SSC (Spread Spectrum Clocking) Criteria <span class="_ _6"></span>...<span class="_ _6"></span><span class="ls1a ws2">.............<span class="_ _6"></span>.................<span class="_ _6"></span>............<span class="_ _6"></span>.................<span class="_ _6"></span>................<span class="_ _6"></span>...<span class="_ _b"> </span><span class="ls2b">57</span></span></div><div class="t m0 xa hc y7c ff4 fs5 fc0 sc0 ls1d ws22">3.14.3<span class="_ _11"> </span> Allowed SSC band <span class="_ _9"></span>...................<span class="_ _6"></span>.............<span class="_ _6"></span>................<span class="_ _6"></span>.............<span class="_ _6"></span>................<span class="_ _6"></span>.............<span class="_ _6"></span>.............<span class="ls22 ws2">.............<span class="_ _b"> </span>57</span></div><div class="t m0 xa hc y7d ff4 fs5 fc0 sc0 ls17 ws2b">3.15<span class="_ _10"> </span>No operation command <span class="_ _6"></span>.............<span class="_ _6"></span>................<span class="_ _6"></span>.............<span class="_ _6"></span>................<span class="_ _6"></span>................<span class="_ _6"></span>.............<span class="_ _6"></span>...............<span class="ls22 ws2">........<span class="_ _6"></span>...<span class="_ _b"> </span>57</span></div><div class="t m0 xa hc y7e ff4 fs5 fc0 sc0 ls17 ws32">3.16<span class="_ _10"> </span>Deselect command <span class="_ _d"> </span>.........<span class="_ _6"></span>................<span class="_ _6"></span>.............<span class="_ _6"></span>................<span class="_ _6"></span>.............<span class="_ _6"></span>................<span class="_ _6"></span>.................<span class="_ _6"></span>......<span class="ls22 ws2">.............<span class="_ _b"> </span>57</span></div><div class="t m0 xa hb y7f ff5 fs5 fc0 sc0 ls17 ws32">4<span class="_ _a"> </span>Truth tables <span class="_ _e"> </span>.......<span class="_ _6"></span>.............<span class="_ _6"></span>................<span class="_ _6"></span>.............<span class="_ _6"></span>................<span class="_ _6"></span>................<span class="_ _6"></span>.............<span class="_ _6"></span>................<span class="_ _6"></span>...<span class="_ _3"></span><span class="ls24 ws2">.<span class="_ _6"></span>............<span class="_ _6"></span>.......<span class="_ _b"> </span>58</span></div><div class="t m0 xa hc y80 ff4 fs5 fc0 sc0 ls1d ws22">4.1<span class="_ _c"> </span>Command truth table <span class="_"> </span>..........................<span class="_ _6"></span>............<span class="_ _6"></span>.................<span class="_ _6"></span>.............<span class="_ _6"></span>................<span class="_ _6"></span>.............<span class="_ _6"></span>.......<span class="ls22 ws2">............<span class="_ _b"> </span>58</span></div><div class="t m0 xa hc y81 ff4 fs5 fc0 sc0 ls17 ws32">4.2<span class="_ _c"> </span>Clock enable truth table. <span class="_ _d"> </span>........<span class="_ _6"></span>................<span class="_ _6"></span>.............<span class="_ _6"></span>................<span class="_ _6"></span>.............<span class="_ _6"></span>................<span class="_ _6"></span>................<span class="ls22 ws2">..........<span class="_ _6"></span>...<span class="_ _b"> </span>59</span></div><div class="t m0 xa hc y82 ff4 fs5 fc0 sc0 ls18 ws2d">4.3<span class="_ _c"> </span>Data mask truth table. <span class="_ _9"></span>............<span class="_ _6"></span>.............<span class="_ _6"></span>................<span class="_ _6"></span>................<span class="_ _6"></span>.............<span class="_ _6"></span>................<span class="_ _6"></span>.............<span class="_ _6"></span>..<span class="ls22 ws2">..............<span class="_ _b"> </span>60</span></div><div class="t m0 xa hb y83 ff5 fs5 fc0 sc0 ls19 ws1e">5<span class="_ _a"> </span>Absolute maximum DC ratings <span class="_ _6"></span>.....<span class="_ _6"></span>...................<span class="_ _6"></span>.................<span class="_ _6"></span>...................<span class="_ _6"></span>................<span class="_ _6"></span>...................<span class="_ _6"></span>...<span class="ls25 ws2">....<span class="_ _b"> </span>61</span></div><div class="t m0 xa hb y84 ff5 fs5 fc0 sc0 ls21 ws35">6<span class="_ _a"> </span>AC &amp; DC operating conditions <span class="_ _e"> </span>..<span class="ls20 ws2">................................................................<span class="ls26">.................<span class="_ _6"></span><span class="ls2a">..............<span class="ls1e">.....<span class="_ _b"> </span>62</span></span></span></span></div><div class="t m0 xa hb y85 ff5 fs5 fc0 sc0 ls2c ws36">Annex A (informative) Differen<span class="ls2d ws37">ces between JESD79-2E and JESD79<span class="_ _6"></span><span class="ls1a ws2">-2D<span class="_ _9"></span>................<span class="_ _6"></span>................<span class="_ _6"></span>.....<span class="_ _b"> </span>109</span></span></div><div class="t m0 x2f ha y86 ff2 fs5 fc0 sc0 ls2e ws2">-i-</div></div><div class="pi" data-data='{"ctm":[1.568627,0.000000,0.000000,1.568627,0.000000,0.000000]}'></div></div>
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