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鎮ㄥソ锛屾杩庝締鍒扮董搴浕瀛愬競鍫寸恫(w菐ng) 鐧婚寗 | 鍏嶈不(f猫i)娉ㄥ唺

SDRAM
闁辫畝锛�79018鏅�(sh铆)闁擄細2011-01-10 14:38:38

銆�銆�SDRAM鍏ㄧū鐐篠ynchronous Dynamic Random Access Memory锛屽嵆鍚屾鍕曟厠(t脿i)闅ㄦ(j墨)瀛樺劜鍣�銆傜洝绠″畠涔熸槸鍕曟厠(t脿i)瀛樺劜鍣�锛屼俊鎭篃鏄瓨鏀惧湪闆诲涓婄殑锛屼篃甯歌瀹氭檪(sh铆)鍒锋柊锛岀敋鑷冲畠涔熸湁琛岄伕閫歊AS銆佸垪閬搁�氫俊铏烠AS锛屽湴鍧�淇¤櫉绶�涔熸槸寰�(f霉)鐢ㄧ殑锛屼絾瀹冨湪鍏�(n猫i)閮ㄧ祼(ji茅)妲�(g貌u)鍙婁娇鐢ㄤ笂鍙堣垏妯�(bi膩o)婧�(zh菙n)DRAM鏈夊緢澶т笉鍚屻�傚紩璧蜂笉鍚岀殑鍩烘湰鍑虹櫦(f膩)榛�(di菐n)灏辨槸甯屾湜SDRAM鐨勯�熷害鏇村揩涓�浜�锛屾豢瓒砅C姗�(j墨)灏�鍏�(n猫i)瀛�閫熷害鐨勮姹傘��

涓昏鍙冩暩(sh霉)

銆�銆�(1) 瀹归噺銆係DRAM鐨勫閲忕稉(j墨ng)甯哥敤XX瀛樺劜鍠厓脳X楂斆楁瘡鍊�(g猫)瀛樺劜鍠厓鐨勪綅鏁�(sh霉)渚嗚〃绀�銆備緥濡傛煇SDRAM鑺墖鐨勫閲忕偤4M脳4脳8bit锛岃〃鏄庤┎瀛樺劜鍣ㄨ姱鐗囩殑瀹归噺鐐�16 M瀛楃瘈(ji茅)?锛�?28 M bit銆�

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銆�銆�灏嶄簬涓�鐗囨櫘閫氱殑PC-100 SDRAM渚嗚锛屽畠鑺墖涓婄殑妯�(bi膩o)璀�10浠ｈ〃浜嗗畠鐨勯亱(y霉n)琛屾檪(sh铆)閻樺懆鏈熺偤10  ns锛屽嵆鍙互鍦�100 MHz鐨勫闋讳笅姝ｅ父宸ヤ綔銆備緥濡傝姱鐗囦笂妯�(bi膩o)鏈�7.5锛岃〃绀哄畠鍙互閬�(y霉n)琛屽湪133MHz鐨勯牷鐜囦笂銆�

銆�銆�(3) 瀛樺彇鏅�(sh铆)闁�銆傜洰鍓嶅ぇ澶氭暩(sh霉)SDRAM鑺墖鐨勫瓨鍙栨檪(sh铆)闁撶偤5銆�6銆�7銆�8鎴�10 ns锛屼絾閫欏彲涓嶅悓浜庣郴绲�(t菕ng)鏅�(sh铆)閻橀牷鐜�銆傛瘮濡傝姱鐗囧粻瀹剁郸鍑虹殑瀛樺彇鏅�(sh铆)闁撶偤7 ns鑰屼笉鏄瓨鍙栧懆鏈�銆傚洜姝わ紝瀹冪殑绯荤当(t菕ng)鏅�(sh铆)閻樺懆鏈熻闀蜂竴浜�锛屼緥濡�10 ns锛屽嵆澶栭牷鐐�100 MHz銆�

銆�銆�(4) CAS鐨勫欢閬叉檪(sh铆)闁撱�傞�欐槸鍒楀湴鍧�鑴堟矕鐨勫弽鎳�(y墨ng)鏅�(sh铆)闁�?锛孎(xi脿n)鍦ㄥぇ澶氭暩(sh霉)鐨凷DRAM(鐣�(d膩ng)澶栭牷鐐�100 MHz鏅�(sh铆))閮借兘閬�(y霉n)琛屽湪CASLatency(CL)锛�2鎴�3鐨勬ā寮忎笅锛屼篃灏辨槸瑾�锛岄�欐檪(sh铆)瀹冨�戣畝鍙栨暩(sh霉)鎿�(j霉)鐨勫欢閬叉檪(sh铆)闁撳彲浠ユ槸鍏╁��(g猫)鏅�(sh铆)閻樺懆鏈熶篃鍙互鏄笁鍊�(g猫)鏅�(sh铆)閻樺懆鏈�銆傚湪SDRAM鐨勫埗閫犻亷绋嬩腑锛屽彲浠ュ皣閫欏��(g猫)鐗规�у鍏DRAM鐨凟EPROM涓�锛屽湪闁嬫(j墨)鏅�(sh铆)涓绘澘鐨凚IOS灏辨渻妾㈡煡姝ら爡(xi脿ng)鍏�(n猫i)瀹�锛屽苟浠L锛�2閫欎竴榛樿獚(r猫n)鐨勬ā寮忛亱(y霉n)琛屻��

銆�銆�(5) 缍滃悎鎬ц兘鐨勮⿻鍍�(ji脿)銆傚皪浜嶱C 100鍏�(n猫i)瀛樹締瑾�锛屽氨鏄姹傜暥(d膩ng)CL锛�3鐨勬檪(sh铆)鍊欙紝tCK(鏅�(sh铆)閻樺懆鏈�) 鐨勬暩(sh霉)鍊艰灏忎簬10 ns锛宼AC瑕佸皬浜�6 ns銆傝嚦浜庣偤浠�涔堣寮�(qi谩ng)瑾�(di脿o)鏄疌L锛�3鐨勬檪(sh铆)鍊欏憿锛岄�欐槸鍥�?y脿n)闁废勮皶顑矉鈧�(g猫)鍏�(n猫i)瀛樻锛岀暥(d膩ng)瑷�(sh猫)缃笉鍚孋L鏁�(sh霉)鍊兼檪(sh铆)锛宼CK鐨勫�煎緢鍙兘鏄笉鐩稿悓鐨�锛岀暥(d膩ng)鐒秚AC鐨勫�间篃鏄笉澶彲鑳界浉鍚岀殑?锛熷們鑸唗鏅�(sh铆)闁撶殑瑷�(j矛)绠楀叕寮忎竴鑸偤锛�

銆�銆�绺藉欢閬叉檪(sh铆)闁擄紳绯荤当(t菕ng)鏅�(sh铆)閻樺懆鏈熋桟L妯″紡鏁�(sh霉)锛嬪瓨鍙栨檪(sh铆)闁撲緥濡�锛屾煇PC100鍏�(n猫i)瀛樼殑瀛樺彇鏅�(sh铆)闁撶偤6 ns锛屾垜鍊戣ō(sh猫)瀹欳L妯″紡鏁�(sh霉)鐐�2(鍗矯AS Latency锛�2)锛屽墖绺藉欢閬叉檪(sh铆)闁擄紳10 ns脳2锛�6 ns锛�26 ns銆傞�欏氨鏄⿻鍍�(ji脿)鍏�(n猫i)瀛樻�ц兘楂樹綆鐨勯噸瑕佹暩(sh霉)鍊笺��

鑸囦竴鑸珼RAM鐨勫崁(q奴)鍒�

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銆�銆�(1) 鐣版鑸囧悓姝�銆傚墠闈粙绱圭殑妯�(bi膩o)婧�(zh菙n)DRAM鏄暟姝RAM锛屼篃灏辨槸瑾皪瀹冭畝/瀵殑鏅�(sh铆)閻樿垏CPU鐨勬檪(sh铆)閻樻槸涓嶄竴妯ｇ殑銆傝�屽湪SDRAM宸ヤ綔鏅�(sh铆)锛屽叾璁�/瀵亷绋嬫槸鑸嘋PU鏅�(sh铆)閻�(PC姗�(j墨)涓槸鐢卞寳姗嬫彁渚涚殑)鍤�(y谩n)鏍煎悓姝ョ殑銆�

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銆�銆�鐐轰簡瀵�(sh铆)鐝�(xi脿n)鍏�(n猫i)閮ㄧ殑澶氶珨骞朵娇瀹冨�戣兘鏈夋晥鍦板伐浣�锛孲DRAM灏遍渶瑕佸鍔犲皪浜庡鍊�(g猫)楂旂殑绠＄悊锛岄�欐ǎ灏卞彲浠ユ帶鍒跺叾涓殑楂�(bank)閫�(j矛n)琛岄爯(y霉)鍏呴浕锛屽苟涓斿湪闇�瑕佷娇鐢ㄧ殑鏅�(sh铆)鍊欓毃鏅�(sh铆)瑾�(di脿o)鐢�銆備竴鍊�(g猫)鍏锋湁鍏╁��(g猫)楂�(bank)鐨凷DRAM涓�鑸渻澶氫竴姊濆彨鍋欱A0鐨勫紩鑵筹紝瀵�(sh铆)鐝�(xi脿n)鍦ㄥ叐鍊�(g猫)bank涔嬮枔鐨勯伕鎿囷細涓�鑸湴锛岀暥(d膩ng)BA0鏄綆闆诲钩鏅�(sh铆)锛岃〃绀築ank0琚伕鎿�锛涜�岀暥(d膩ng)BA0鏄珮闆诲钩鏅�(sh铆)锛孊ank1灏辨渻琚伕涓�傞’鐒�锛岃嫢鑺墖鍏�(n猫i)鏈�4鍊�(g猫)楂�(bank)鏅�(sh铆)锛屽氨闇�瑕佸叐姊濆紩绶氫締閬告搰锛岄�氬父灏辨槸BA0鍜孊A1銆�

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鍒嗛鑸囩壒榛�(di菐n)

SDRAM鐨勫垎椤炶垏鐗归粸(di菐n)1

SDRAM鐨勫垎椤炶垏鐗归粸(di菐n)2

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宸叉敹閷勮姊�162542鍊�(g猫)