銆�銆�DDR SDRAM鑸嘢DRAM鐨勪笉鍚屼富瑕侀珨鐝�(xi脿n)鍦ㄤ互涓嬪咕鍊�(g猫)鏂归潰锛�
銆�銆�(1) 鍒濆鍖栥�係DRAM鍦ㄩ枊(k膩i)濮嬩娇鐢ㄥ墠瑕侀��(j矛n)琛屽垵濮嬪寲锛岄�欓爡(xi脿ng)宸ヤ綔涓昏鏄皪(du矛)妯″紡瀵勫瓨鍣ㄩ��(j矛n)琛岃ō(sh猫)缃�锛屽嵆MRS銆侱DR SDRAM鑸嘢DRAM涓�妯�锛屽湪闁�(k膩i)姗�(j墨)鏅�(sh铆)涔熻閫�(j矛n)琛孧RS锛屼笉閬�(gu貌)鐢变簬鎿嶄綔鍔熻兘鐨勫澶氾紝DDR SDRAM鍦∕RS涔嬪墠閭勫鍔犱簡涓�鍊�(g猫)鎿�(ku貌)灞曟ā寮忓瘎瀛樺櫒瑷�(sh猫)缃�(EMRS)閬�(gu貌)绋�銆傞�欏��(g猫)鎿�(ku貌)灞曟ā寮忓瘎瀛樺櫒灏�(du矛)DLL鐨勬湁鏁堣垏绂佹銆佽几鍑洪﹨(q奴)鍕�(d貌ng)寮�(qi谩ng)搴︾瓑鍔熻兘瀵�(sh铆)鏂芥帶鍒躲��
銆�銆�(2) 鏅�(sh铆)閻�銆傚墠闈粙绱筍DRAM鏅�(sh铆)宸茬稉(j墨ng)鐪嬪埌锛孲DRAM鐨勮畝/瀵�(xi臎)閲囩敤鍠竴鏅�(sh铆)閻樸�傚湪DDR SDRAM宸ヤ綔涓鐢ㄥ樊鍒嗘檪(sh铆)閻�锛屼篃灏辨槸鍏╁��(g猫)鏅�(sh铆)閻橈紝涓�鍊�(g猫)鏄疌LK锛屽彟涓�鍊�(g猫)鏄垏涔嬪弽鐩哥殑CK#銆�
銆�銆�CK#骞朵笉鑳借鐞嗚В鐐虹浜屽��(g猫)瑙哥櫦(f膩)鏅�(sh铆)閻�(鍙互鍦ㄨ瑳杩癉DR鍘熺悊鏅�(sh铆)绨�(ji菐n)鍠湴閫欎箞姣斿柣)锛屽畠鑳借捣鍒拌Ц鐧�(f膩)鏅�(sh铆)閻樻牎婧�(zh菙n)鐨勪綔鐢�銆傜敱浜庢暩(sh霉)鎿�(j霉)鏄湪CLK鐨勪笂涓嬫部瑙哥櫦(f膩)鐨勶紝閫犳垚鍌宠几鍛ㄦ湡绺煭浜嗕竴鍗�锛屽洜姝ゅ繀闋堣淇濊瓑鍌宠几鍛ㄦ湡鐨勭┅(w臎n)瀹氫互纰轰繚鏁�(sh霉)鎿�(j霉)鐨勬纰哄偝杓革紝閫欏氨瑕佹眰灏�(du矛)CLK鐨勪笂涓嬫部闁撹窛瑕佹湁绮剧⒑鐨勬帶鍒�銆備絾鍥�?y脿n)闂囧洘?銆侀浕闃绘�ц兘鐨勬敼璁婄瓑鍘熷洜锛孋LK涓婁笅娌块枔璺濆彲鑳界櫦(f膩)鐢熻畩鍖栵紝姝ゆ檪(sh铆)鑸囧叾鍙嶇浉鐨凜K#灏辫捣鍒扮尘姝ｇ殑浣滅敤(CLK涓婂崌蹇笅闄嶆參锛孋K#鍓囨槸涓婂崌鎱笅闄嶅揩)銆傝�岀敱浜庝笂涓嬫部瑙哥櫦(f膩)鐨勫師鍥�锛屼篃浣緾L锛�1.5鎴�2.5鎴愮偤鍙兘锛屽苟瀹规槗瀵�(sh铆)鐝�(xi脿n)銆�
銆�銆�(3) 鏁�(sh霉)鎿�(j霉)閬稿彇(DQS)鑴堟矕銆侱QS鏄疍DR SDRAM涓殑閲嶈淇¤櫉(h脿o)锛屽叾鍔熻兘涓昏鐢ㄤ締(l谩i)鍦ㄤ竴鍊�(g猫)鏅�(sh铆)閻樺懆鏈熷収(n猫i)婧�(zh菙n)纰哄湴鍗�(q奴)鍒嗗嚭姣忓��(g猫)鍌宠几鍛ㄦ湡锛屽苟浣挎暩(sh霉)鎿�(j霉)寰椾互婧�(zh菙n)纰烘帴鏀�銆傛瘡涓�濉奃DR SDRAM鑺墖閮芥湁涓�鍊�(g猫)闆欏悜鐨凞QS淇¤櫉(h脿o)绶氥�傚湪瀵�(xi臎)鍏ユ檪(sh铆)锛屽畠鐢ㄤ締(l谩i)鍌抽�佺敱鍖楁⿱鐧�(f膩)渚�(l谩i)鐨凞QS淇¤櫉(h脿o)锛涘湪璁�鍙栨檪(sh铆)锛屽墖鐢辫姱鐗囩敓鎴怐QS鍚戝寳姗嬬櫦(f膩)閫�?锛熸ⅱ鍝塮(shu艒)锛孌QS灏辨槸鏁�(sh霉)鎿�(j霉)鐨勫悓姝ヤ俊铏�(h脿o)銆�
銆�銆�(4) 瀵�(xi臎)鍏ュ欢鏅�(sh铆)銆傚湪瀵�(xi臎)鍏ユ檪(sh铆)锛岃垏SDRAM鐨�0寤舵檪(sh铆)涓嶄竴妯�锛孌DRSDRAM鐨勫(xi臎)鍏ュ欢閬插凡缍�(j墨ng)涓嶆槸0浜�銆傚湪鐧�(f膩)鍑哄(xi臎)鍏ュ懡浠ゅ悗锛孌QS鑸囧(xi臎)鍏ユ暩(sh霉)鎿�(j霉)瑕佺瓑涓�娈垫檪(sh铆)闁撴墠鏈�(hu矛)閫侀仈(d谩)銆傞�欏��(g猫)鍛ㄦ湡琚ū(ch膿ng)鐐篋QS鐩稿皪(du矛)浜庡(xi臎)鍏ュ懡浠ょ殑寤堕伈鏅�(sh铆)闁撱��
銆�銆�鐐轰粈涔堟渻(hu矛)鏈夐�欐ǎ鐨勫欢閬插憿锛熷師鍥犱篃鍦ㄤ簬鍚屾锛岀暍绔熷湪涓�鍊�(g猫)鏅�(sh铆)閻樺懆鏈熷収(n猫i)閫�(j矛n)琛屽叐娆″偝閫侀渶瑕佸緢楂樼殑鎺у埗绮惧害锛屽畠蹇呴爤瑕佺瓑鎺ユ敹鏂瑰仛濂藉厖鍒嗙殑婧�(zh菙n)鍌欐墠琛�銆倀DQSS鏄疍DR鍏�(n猫i)瀛樺(xi臎)鍏ユ搷浣滅殑涓�鍊�(g猫)閲嶈鍙冩暩(sh霉)锛屽お鐭殑瑭�(hu脿)鎭愭�曟帴鏀舵湁瑾�锛屽お闀�(zh菐ng)鍓囨渻(hu矛)閫犳垚绺界窔绌洪枒銆倀DQSS鏈�鐭笉鑳藉皬浜�0.75鍊�(g猫)鏅�(sh铆)閻樺懆鏈�锛屾渶闀�(zh菐ng)涓嶈兘瓒呴亷(gu貌)1.25鍊�(g猫)鏅�(sh铆)閻樺懆鏈�銆�
銆�銆�(5) 绐佺櫦(f膩)闀�(zh菐ng)搴﹁垏瀵�(xi臎)鍏ユ帺纰�銆傚湪DDR SDRAM涓紝绐佺櫦(f膩)闀�(zh菐ng)搴﹀彧鏈�2銆�4銆�8涓夌ó閬告搰锛屾矑(m茅i)鏈変簡SDRAM鐨勯毃姗�(j墨)瀛樺彇鐨勬搷浣�(绐佺櫦(f膩)闀�(zh菐ng)搴︾偤1)鍜屽叏闋�(y猫)寮忕獊鐧�(f膩)鏂瑰紡銆傚悓鏅�(sh铆)锛岀獊鐧�(f膩)闀�(zh菐ng)搴︾殑瀹氱京涔熻垏SDRAM鐨勪笉涓�妯ｄ簡锛屽畠涓嶅啀鎸囨墍閫ｇ簩(x霉)灏嬪潃鐨勫瓨鍎�(ch菙)鍠厓鏁�(sh霉)閲忥紝鑰屾槸鎸囬�ｇ簩(x霉)鐨勫偝杓稿懆鏈熸暩(sh霉)銆�
銆�銆�灏�(du矛)浜庣獊鐧�(f膩)瀵�(xi臎)鍏ワ紝濡傛灉鍏朵腑鏈変笉鎯冲瓨鍏ョ殑鏁�(sh霉)鎿�(j霉)锛屼粛鍙互閬�(y霉n)鐢―M淇¤櫉(h脿o)閫�(j矛n)琛屽睆钄姐�侱M淇¤櫉(h脿o)鍜屾暩(sh霉)鎿�(j霉)淇¤櫉(h脿o)鍚屾檪(sh铆)鐧�(f膩)鍑�锛屾帴鏀舵柟鍦―QS鐨勪笂鍗囨部鑸囦笅闄嶆部渚�(l谩i)鍒ゆ柗DM鐨勭媭鎱�(t脿i)锛屽鏋淒M鐐洪珮闆诲钩锛岄偅涔堜箣鍓嶅緸DQS鑴堟矕涓儴閬稿彇鐨勬暩(sh霉)鎿�(j霉)灏辫灞忚斀浜�銆�
銆�?銆�?锛夊欢閬查帠瀹氬洖璺�(DLL)銆侱DR SDRAM灏�(du矛)鏅�(sh铆)閻樼殑绮剧⒑鎬ф湁钁楀緢楂樼殑瑕佹眰锛岃�孌DR SDRAM鏈夊叐鍊�(g猫)鏅�(sh铆)閻橈紝涓�鍊�(g猫)鏄閮ㄧ殑绺界窔鏅�(sh铆)閻�锛屼竴鍊�(g猫)鏄収(n猫i)閮ㄧ殑宸ヤ綔鏅�(sh铆)閻樸�傚湪鐞嗚珫涓�锛孌DRSDRAM鐨勯�欏叐鍊�(g猫)鏅�(sh铆)閻樻噳(y墨ng)瑭叉槸鍚屾鐨�锛屼絾鐢变簬绋ó鍘熷洜锛屽婧害銆侀浕澹撴尝鍕�(d貌ng)鑰岀敘(ch菐n)鐢熷欢閬蹭娇鍏╄�呭緢闆ｅ悓姝�锛屾洿浣曟硜鏅�(sh铆)閻橀牷鐜囨湰韬篃鏈変笉绌�(w臎n)瀹氱殑鎯呮硜銆傞�欏氨闇�瑕佹牴鎿�(j霉)澶栭儴鏅�(sh铆)閻樺嫊(d貌ng)鎱�(t脿i)淇鍏�(n猫i)閮ㄦ檪(sh铆)閻樼殑寤堕伈渚�(l谩i)瀵�(sh铆)鐝�(xi脿n)鍏�(n猫i)閮ㄦ檪(sh铆)閻樿垏澶栭儴鏅�(sh铆)閻樼殑鍚屾锛岀偤姝ゅ皥(zhu膩n)闁�(m茅n)瑷�(sh猫)缃簡DLL銆傚埄鐢ㄩ�欑ó闆昏矾锛屽彲浣垮収(n猫i)閮ㄦ檪(sh铆)閻樿垏澶栭儴鏅�(sh铆)閻樹繚鎸佸悓姝ャ��
