nand flash½á¹¹ÒÔ¼°¶Áд·ÖÎö
NAND Flash µÄÊý¾ÝÊÇÒÔbit µÄ·½Ê½±£´æÔÚmemory cell£¬Ò»°ãÀ´Ëµ£¬Ò»¸öcell ÖÐÖ»ÄÜ´æ´¢Ò»¸öbit¡£ÕâЩcell ÒÔ8 ¸ö»òÕß16 ¸öΪµ¥Î»£¬Á¬³Ébit line£¬ÐγÉËùνµÄbyte(x8)/word(x16)£¬Õâ¾ÍÊÇNAND Device µÄλ¿í¡£ÕâЩLine »áÔÙ×é³ÉPage.
(Nand Flash ÓжàÖֽṹ£¬ÎÒʹÓõÄNand Flash ÊÇK9F1208,ÏÂÃæÄÚÈÝÕë¶ÔÈýÐǵÄK9F1208U0M)£¬Ã¿Ò³528Byte£¬Ã¿32 ¸öpage ÐγÉÒ»¸öBlock£¬ Sizeof(block)=16kByte ¡£
1 block="16kbyte"£¬512Mbit=64Mbyte£¬Numberof(block)=4096 1block=32page, 1page=528byte=512byte(Main Area)+16byte(Spare Area)
Nand flash ÒÔҳΪµ¥Î»¶ÁдÊý¾Ý£¬¶øÒÔ¿éΪµ¥Î»²Á³ýÊý¾Ý¡£
°´ÕÕÕâÑùµÄ×éÖ¯·½Ê½¿ÉÒÔÐγÉËùνµÄÈýÀàµØÖ·£º
--Block Address -- Page Address --Column Address
¶ÔÓÚNAND Flash À´½²£¬µØÖ·ºÍÃüÁîÖ»ÄÜÔÚI/O[7:0]ÉÏ´«µÝ£¬Êý¾Ý¿í¶ÈÊÇ8 λ¡£
512byteÐèÒª9bitÀ´±íʾ£¬¶ÔÓÚ528byteϵÁеÄNAND£¬Õâ512byte±»·Ö³É1st halfºÍ2nd half,¸÷×ԵķÃÎÊÓɵØÖ·Ö¸ÕëÃüÁîÀ´Ñ¡Ôñ£¬A[7:0]¾ÍÊÇËùνµÄcolumn address¡£
32 ¸öpage ÐèÒª5bit À´±íʾ£¬Õ¼ÓÃA[13:9]£¬¼´¸Ãpage ÔÚ¿éÄÚµÄÏà¶ÔµØÖ·¡£BlockµÄµØÖ·ÊÇÓÉA14 ÒÔÉϵÄbit À´±íʾ£¬ÀýÈç512Mb µÄNAND£¬¹²4096block£¬Òò´Ë£¬ÐèÒª12 ¸öbit À´±íʾ£¬¼´A[25:14]£¬Èç¹ûÊÇ1Gbit µÄ528byte/pageµÄNAND Flash£¬Ôòblock addressÓÃA[26:24]±íʾ¡£¶øpage address¾ÍÊÇblcok address|page address in block
NAND Flash µÄµØÖ·±íʾΪ£º
Block Address|Page Address in block|halfpage pointer|Column Address
µØÖ·´«ËÍ˳ÐòÊÇColumn Address,Page Address,Block Address¡£
ÓÉÓÚµØÖ·Ö»ÄÜÔÚI/O[7:0]ÉÏ´«µÝ£¬Òò´Ë£¬±ØÐë²ÉÓÃÒÆλµÄ·½Ê½½øÐС£ ÀýÈ磬¶ÔÓÚ512Mbit x8 µÄNAND flash£¬µØÖ··¶Î§ÊÇ0~0x3FF_FFFF£¬Ö»ÒªÊÇÕâ¸ö·¶Î§ÄÚµÄÊýÖµ±íʾµÄµØÖ·¶¼ÊÇÓÐЧµÄ¡£ÒÔNAND_ADDR ΪÀý£º µÚ1 ²½ÊÇ´«µÝcolumn address£¬¾ÍÊÇNAND_ADDR[7:0]£¬²»ÐèÒÆλ¼´¿É´«µÝµ½I/O[7:0]ÉÏ£¬¶øhalfpage pointer ¼´bit8 ÊÇÓɲÙ×÷Ö¸Áî¾ö¶¨µÄ£¬¼´Ö¸Áî¾ö¶¨ÔÚÄĸöhalfpage ÉϽøÐжÁд¡£¶øÕæÕýµÄbit8 µÄÖµÊÇdon't care µÄ¡£ µÚ2 ²½¾ÍÊǽ«NAND_ADDR ÓÒÒÆ9 룬½«NAND_ADDR[16:9]´«µ½I/O[7:0]ÉÏ µÚ3 ²½½«NAND_ADDR[24:17]·Åµ½I/O ÉÏ µÚ4 ²½ÐèÒª½«NAND_ADDR[25]·Åµ½I/O ÉÏ Òò´Ë£¬Õû¸öµØÖ·´«µÝ¹ý³ÌÐèÒª4 ²½²ÅÄÜÍê³É£¬¼´4-step addressing¡£ Èç¹ûNAND Flash µÄÈÝÁ¿ÊÇ256Mbit ÒÔÏ£¬ÄÇô£¬block adress ×î¸ßλֻµ½bit24£¬Òò´ËÑ°Ö· Ö»ÐèÒª3 ²½¡
Ïà¹ØÎĵµ£º
ÍøÒ³²¥·ÅflashûÓÐÉùÒôºÍFirefoxÎÞ·¨°²×°²å¼þµÄÎÊÌâ
×÷Õߣºcywater2000
ÈÕÆÚ£º2009-11-29
½ñÌìͻȻ·¢ÏÖÎÒµÄFirefox²¥·ÅflashûÓÐÉùÒô£¬Ð¶ÔØÖØ×°flash player¶¼²»ÐУ¬ÎÞÂÛÊÇ9»¹ÊÇ10¡£µ«ÎÒµÄIEÓÐÉùÒô¡£¼ì²éÁËÒ»±é£¬IEµÄflash playerÊÇ9£¬Éý¼¶µÄ10Ö®ºó£¬Ã»ÓÐÉùÒô…ÖØÐÂ×°»Ø9£¬Ò²Ã»ÉùÒôÁË¡£ÎÒ·èÁË£¡
......
1.½«ÏÂÃæ´úÂ븴ÖÆÓÃд×Ö°å±£´æΪflash.jsÎļþ.
// Show Hide Poll
function WriteFlash(flash,_width,_height) {
document.writeln("<object classid=\"clsid:D27CDB6E-AE6D-11cf-96B8-444553540000\" codebase=\" ......
ǰ̨´úÂë
<object classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=7,0,19,0" width='<%=focus_width %>' height='<%=swf_height %>'>
<pa ......
ÎÄÕÂÀàÐÍ:¼¼ÊõÎĵµ ¸üÐÂʱ¼ä:2009-03-03 ·¢²¼Õß:HIT-ASP ÎÄÕÂÀ´Ô´:HIT-ASP µã»÷´ÎÊý:550
Õª×Ô:
http://www.zzsky.cn/build/content/658.htm
http://www.blueidea.com/tech/multimedia/2 ......
Ä¿Ç°À´½²£¬ÎÒÒÀÈ»»¹²»»á×öÒ»¸öСÓÎÏ·³öÀ´¡£×öÓÎÏ·ÐèÒªÖªµÀºÜ¶à¶«Î÷£¬Õâ¸öflash Ö»ÊÇÒ»¸ö×ÔÓé×ÔÀֵĶ«Î÷¡£ÒªÊÇ¿´ÁËÎ󵼾ͱð¹ÖÁË¡£
ºÃ£¬ÖÆ×÷Õâ¸ö¶«Î÷֮ǰ£¬ÆäʵÕâƪÎÄÕÂÓÐһЩÖظ´ÁË£¬²»¹ýÖ»ÊÇÒ»ÖÖdemoʽµÄÑÝʾ¡£Í¨¹ý¼üÅÌÀ´¿ØÖÆ¿ØÖÆÒ»¸öÈËÎï×߶¯¡£
ÉÏÃæÊÇÒ»ÕÅ͸Ã÷µÄpngλͼ¡£ÓÐËĸö²»Í¬µÄ·½Ïò¡£¿ÉÒÔ¿´µ½ »ù±¾ÉÏÉÏÏ ......