¿Î³ÌÉè¼ÆËµÃ÷Êé µÚ IIÒ³
Ŀ ¼
1 Ð÷ÂÛ ........................................................................................................................................ 1 1.1 ¿ÎÌâÃèÊö ........................................................................................................................ 1 1.2 »ù±¾¹¤×÷ÔÀí¼°¿òͼ .................................................................................................... 1 2 Ïà¹ØÐ¾Æ¬¼°Ó²¼þµç·Éè¼Æ .................................................................................................... 2 2.1 74LS48оƬ .................................................................................................................. 2 2.1.1 74LS48µÄ¹¦ÄÜÌØÐÔ ............................................................................................... 2 2.1.2 74LS148 оƬ¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡.....3 2.1.3 74LS148µÄ¹¦ÄÜÌØÐÔ¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡...4 2.1.4 555¶¨Ê±µç·µÄ½éÉÜ¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡...5 2.1.5 74LS192оƬ¼°Æä¹¦ÄܽéÉÜ¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡...6 2.1.6 74LS121оƬ¼°Æä¹¦ÄܽéÉÜ¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡...7 2.2 Êý×ÖÇÀ´ðÆ÷ÔÀíÓëÔÀíͼ¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡9 2.3 ±¨¾¯µç·ÔÀíÓëÔÀíͼ¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡..10 2.4 ¶¨Ê±µç·ÔÀíÓëÔÀíͼ¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡..10 2.5 ʱÐò¿ØÖƵç·ÔÀíÓëÔÀíͼ¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡..11 3 Ïà¹Øµç··ÂÕæÍ¼¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡...13 3.1 Êý×ÖÇÀ´ðÆ÷·ÂÕæÍ¼¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡..14 3.2 ±¨¾¯¼°Ê±Ðò¿ØÖƵç··ÂÕæÍ¼¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡..........15 3.3 ¶¨Ê±µç··ÂÕæÍ¼¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡..16 ×ܽá .......................................................................................................................................... 17 ÖÂл .......................................................................................................................................... 18 ²Î¿¼ÎÄÏ× .................................................................................................................................. 19
¿Î³ÌÉè¼ÆËµÃ÷Êé µÚ1Ò³
1 Ð÷ÂÛ
1.1 ¿ÎÌâÃèÊö
ÏÖÔÚÇÀ´ðÆ÷Êг¡¾ºÕù¼¤ÁÒ£¬ÖÖÀà·±¶à¡£ºÜ¶àµ¥Î»ÔÚ¾Ù°ì֪ʶ¾ºÈü»î¶¯Ê±ÓÐÇÀ´ðÒ»ÏÐèÒªÓõ½ÇÀ´ðÆ÷£¬ÆÕͨµç×ÓÇÀ´ðÆ÷ʹÓÃͨÓü¯³ÉµçÂ·ÖÆ³É£¬¼Û¸ñ¸ß¡¢ÏÔʾ·½Ê½¼òµ¥¡¢ÐԼ۱Ƚϲ±¾ÎÄÉè¼ÆµÄÊý×ÖÇÀ´ðÆ÷ÖÆ×÷¼òµ¥£¬ÏÔʾ·½Ê½ÏȽø£¬ÐԼ۱Ƚϸß,ËùÒÔÓкܴóµÄ·¢Õ¹¿Õ¼ä¡£
Êý×ÖÇÀ´ðÆ÷ÓÉÖ÷Ìåµç·ÓëÀ©Õ¹µç·×é³É¡£ÓÅÏȱàÂëµç·¡¢Ëø´æÆ÷¡¢ÒëÂëµç·½«²ÎÈü¶ÓµÄÊäÈëÐźÅÔÚÏÔʾÆ÷ÉÏÊä³ö£»ÓÿØÖƵç·ºÍÖ÷³ÖÈË¿ª¹ØÆô¶¯±¨¾¯µç·£¬ÒÔÉÏÁ½²¿·Ö×é³ÉÖ÷Ìåµç·¡£Í¨¹ý¶¨Ê±µç·ºÍÒëÂëµç·½«ÃëÂö³å²úÉúµÄÐźÅÔÚÏÔʾÆ÷ÉÏÊä³öʵÏÖ¼ÆÊ±¹¦ÄÜ£¬¹¹³ÉÀ©Õ¹µç·¡£ 1.2 »ù±¾¹¤×÷ÔÀí¼°¿òͼ
¶à·Êý×ÖÏÔʾÇÀ´ðÆ÷ÓÃÓÚ±íÉÙÄ꿪չ¿ÆÆÕ»î¶¯£¬ÈçÖÇÄܾºÈüµÈ¡£¸Ã¿ÎÌâÀûÓõç×Ó¼¼Êõ֪ʶÉè¼Æ³öÒ»¸ö¶à¹¦ÄÜÊý×ÖÏÔʾÇÀ´ðÆ÷£¬ÇÀ´ðÆ÷ͬʱ¹©¶àÃûÑ¡ÊÖ»ò¶à¸ö´ú±í¶Ó±ÈÈü£¬·Ö±ðÓöà¸ö°´Å¥±íʾ¡£ÉèÖÃÒ»¸öϵͳÇå³ýºÍÇÀ´ð¿ØÖÆ¿ª¹ØS£¬¸Ã¿ª¹ØÓÉÖ÷³ÖÈË¿ØÖÆ¡£ÇÀ´ðÆ÷¾ßÓÐËø´æÓëÏÔʾ¹¦ÄÜ¡£¼´Ñ¡ÊÖ°´¶¯°´Å¥£¬Ëø´æÏàÓ¦µÄ±àºÅ£¬²¢ÔÚLEDÊýÂë¹ÜÉÏÏÔʾ£¬Í¬Ê±ÑïÉùÆ÷·¢³ö±¨¾¯ÉùÏìÌáʾ¡£Ñ¡ÊÖÇÀ´ðʵÐÐÓÅÏÈËø´æ£¬ÓÅÏÈÇÀ´ðÑ¡ÊֵıàºÅÒ»Ö±±£³Öµ½Ö÷³ÖÈ˽«ÏµÍ³Çå³ýΪֹ¡£±¾¿ÎÌâÓÐÀûÓÚÅàÑøÑ§Éú¿ª·¢Éè¼ÆÄÜÁ¦ºÍ´´Ð¾«Éñ£¬Îª½ñºó²Î¼Ó¹¤×÷»ò´ÓÊÂͨÐÅÀà¡¢µç×ÓÀàµÈʵ¼Ê¹¤×÷µì¶¨»ù´¡¡£
ͼ1 »ù±¾¹¤×÷¿òͼ
¿Î³ÌÉè¼ÆËµÃ÷Êé µÚ2Ò³
2 Ïà¹ØÐ¾Æ¬¼°Ó²¼þµç·Éè¼Æ
2.1 74LS48оƬ
ͼ2 74LS48Òý½Åͼ
A- D¶ËΪÒëÂëµØÖ·ÊäÈë¶Ë
RBIΪÂö³åÏûÒþÊäÈë¶Ë£¨µÍµçƽÓÐЧ£©
BI/RBOΪÏûÒþÊäÈë/Âö³åÏûÒþÊä³ö£¨µÍµçƽÓÐЧ£© LTΪµÆ²âÊÔÊäÈë¶Ë£¨µÍµçƽÓÐЧ£© 2.1.1 74LS48µÄ¹¦ÄÜÌØÐÔ
£££
¿Î³ÌÉè¼ÆËµÃ÷Êé µÚ3Ò³
±í£± 74LS48µÄ¹¦Äܱí
Ê®½øÊý »ò¹¦ÄÜ 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 BI RBI LT
2.1.2 74LS148оƬ
74ls48Òý½Å¹¦ÄÜ±í¡ªÆß¶ÎÒëÂëÇý¶¯Æ÷¹¦Äܱí BI/RBO ÊäÈë Êä³ö LT RBI D C B A H H H H H H H H H H H H H H H H H x H L x x x x x x x x x x x x x x x x L x 0 0 0 0 0 0 0 1 0 0 1 0 0 0 1 1 0 1 0 0 0 1 0 1 0 1 1 0 0 1 1 1 1 0 0 0 1 0 0 1 1 0 1 0 1 0 1 1 1 1 0 0 1 1 0 1 1 1 1 0 1 1 1 1 x x x x 0 0 0 0 x x x x H H H H H H H H H H H H H H H H L L H a b c d e f g 1 1 1 1 1 1 0 0 1 1 0 0 0 0 1 1 0 1 1 0 1 1 1 1 1 0 0 1 0 1 1 0 0 1 1 1 0 1 1 0 1 1 0 0 1 1 1 1 1 1 1 1 0 0 0 0 1 1 1 1 1 1 1 1 1 1 0 0 1 1 0 0 0 1 1 0 1 0 0 1 1 0 0 1 0 1 0 0 0 1 1 1 0 0 1 0 1 1 0 0 0 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 ±¸×¢ 1 2 3 4 74LS148ÊÇÓÅÏȱàÂëÆ÷£¬ÊÇΪÁ˽â¾öÈ絥Ƭ»ú¿ØÖÆÏµÍ³ºÍÊý×Öµç·ÖУ¬ÎÞ·¨¶Ô¼¸¸ö°´Å¥µÄͬʱÏìÓ¦×ö³ö·´Ó³µÄÎÊÌ⣬ËüÔÊÐíͬʱÊäÈëÁ½¸öÒÔÉϱàÂëÐźš£²»¹ýÔÚÉè¼ÆÓÅÏȱàÂëÆ÷ʱÒѾ½«ËùÓеÄÊäÈëÐźŰ´ÓÅÏÈ˳ÐòÅÅÁ˶ӣ¬µ±¼¸¸öÊäÈëÐźÅͬʱ³öÏÖʱ£¬Ö»¶ÔÆäÖÐÓÅÏÈȨ×î¸ßµÄÒ»¸ö½øÐбàÂë¡£74LS148Òý½ÅͼÈçͼËùʾ£º