TLC549中文数据手册

=¡õ98-6-30¡õ= P&S Î人Á¦Ô´µç×ӹɷÝÓÐÏÞ¹«Ë¾ 7-1 TLC548C,TLC548I TLC549C,TLC549I ´ø´®ÐпØÖÆ 8 λģÊýת»»Æ÷ Ò»¡¢¸ÅÊö 1.1 Ò»°ã˵Ã÷ TLC548ºÍ TLC549ÊÇÒÔ 8λ¿ª¹ØµçÈÝÖð´Î±Æ½ü A/D ת»»Æ÷Ϊ»ù´¡¶ø¹¹ÔìµÄ CMOS A/D ת»»Æ÷¡£ËüÃÇÉè ¼Æ³ÉÄÜͨ¹ý 3̬Êý¾ÝÊä³öºÍÄ£ÄâÊäÈëÓë΢´¦ÀíÆ÷»òÍâΧÉ豸´®Ðнӿڡ£ TLC548ºÍ TLC549½öÓÃÊäÈë/Êä³öʱ ÖÓ£¨ I/O CLOCK £©ºÍоƬѡÔñ£¨ CS £©ÊäÈë×÷Êý¾Ý¿ØÖÆ¡£ TLC548µÄ×î¸ß I/O CLOCK ÊäÈëƵÂÊΪ 2.048MHz£¬ ¶ø TLC549µÄ I/O CLOCK ÊäÈëƵÂÊ×î¸ß¿É´ï 1.1MHz¡£ÓйØÓë´ó¶àÊýͨÓÃ΢´¦ÀíÆ÷½Ó¿ÚµÄÏêϸ×ÊÁÏÒÑÓɹ¤³§ ×¼±¸ºÃ£¬¿É¹©Ê¹ÓᣠTLC548ºÍ TLC549µÄÔËÓÃÓë½Ï¸´Ô TLC540ºÍ TLC541µÄÔËÓ÷dz£ÏàËÆ£»²»¹ý£¬ TLC548ºÍ TLC549 ÌṩÁËƬÄÚϵͳʱÖÓ£¬Ëüͨ³£¹¤×÷ÔÚ 4MHzÇÒ²»ÐèÒªÍⲿԪ¼þ¡£Æ¬ÄÚϵͳʱÖÓʹÄÚ²¿Æ÷¼þµÄ²Ù×÷¶ÀÁ¢ÓÚ´®ÐÐ ÊäÈë/Êä³öµÄʱÐò²¢ÔÊÐí TLC548ºÍ TLC549ÏóÐí¶àÈí¼þºÍÓ²¼þËùÒªÇóµÄÄÇÑù¹¤×÷¡£ I/O CLOCK ºÍÄÚ²¿ÏµÍ³ ʱÖÓÒ»Æð¿ÉÒÔʵÏÖ¸ßËÙÊý¾Ý´«ËÍÒÔ¼°¶ÔÓÚ TLC548ΪÿÃë 45,500´Îת»»¡¢¶ÔÓÚ TLC549ΪÿÃë 40,000´Îת»» µÄת»»Ëٶȡ£ TLC548ºÍ TLC549µÄÆäËûÌصã°üÀ¨Í¨ÓÿØÖÆÂß¼­£¬¿É×Ô¶¯¹¤×÷»òÔÚ΢´¦ÀíÆ÷¿ØÖÆϹ¤×÷µÄƬÄÚ²ÉÑù-±£ ³Öµç·£¬¾ßÓвî·Ö¸ß×迹»ù×¼µçѹÊäÈë¶Ë¡¢Ò×ÓÚʵÏÖ±ÈÂÊת»»£¨ ratiometric conversion£©µÄ¸ßËÙת»»Æ÷£¬¶¨ ±ê£¨ scaling£©ÒÔ¼°ÓëÂß¼­ºÍµçÔ´ÔëÉù¸ôÀëµÄµç·¡£Õû¸ö¿ª¹ØµçÈÝÖð´Î±Æ½üת»»Æ÷µç·µÄÉè¼ÆÔÊÐíÔÚСÓÚ 17 ¦Ì sµÄʱ¼äÄÚÒÔ×î´ó×ÜÎó²îΪ¡À 0.5 ×îµÍÓÐЧ루 LSB £©µÄ¾«¶ÈʵÏÖת»»¡£ TLC548C ºÍ TLC549C µÄ¹¤×÷ζȷ¶Î§Îª 0 ¡æÖÁ 70¡æ¡£ TLC548I ºÍ TLC549I µÄ¹¤×÷ζȷ¶Î§Îª-40 ¡æ ÖÁ 85¡æ¡£ ¿ÉÑ¡Ïî ·â ×°TA СÐÍ£¨ D £© ËÜÁÏ DIP £¨ P £© 0¡æÖÁ 70¡æ TLC548CD TLC549CD TLC548CP TLC549CP -40¡æÖÁ 85¡æ TLC548ID TLC549ID TLC548IP TLC549IP 1.2 Ìص㠡¤ 8λ·Ö±æÂÊ A/D ת»»Æ÷ ¡¤Î¢´¦ÀíÆ÷ÍâÉè»ò¶ÀÁ¢¹¤×÷ ¡¤²î·Ö»ù×¼ÊäÈëµçѹ ¡¤×ª»»Ê±¼ä 17¦Ì s Max ¡¤Ã¿´Î×Ü´æÈ¡Óëת»»ÖÜÆÚÊý TLC548 ¸ß´ï 45,500 TLC549 ¸ß´ï 40,000 ¡¤Æ¬ÄÚÈí¼þ¿É¿Ø²ÉÑù——±£³Ö ¡¤×ܲ»¿Éµ÷ÕûÎó²î£¨ Total Unadjusted Error £© ¡À 0.5LSB Max ¡¤ 4MHzµäÐÍÄÚ²¿ÏµÍ³Ê±ÖÓ ¡¤¿íµçÔ´·¶Î§ 3V ÖÁ 6V ¡¤µÍ¹¦ºÄ 15mW Max ¡¤ÄÜÀíÏëµØÓÃÓÚ°üÀ¨µç³Ø¹©µç±ãЯʽÒDZíµÄµÍ³É±¾¡¢¸ßÐÔÄÜÓ¦Óà ¡¤Òý½ÅºÍ¿ØÖÆÐźÅÓë TLC540¡¢ TLC545 8λ A/D ת»»Æ÷ÒÔ¼° TLC1540 10λ A/D ת»»Æ÷¼æÈÝ ¡¤ CMOS ¹¤ÒÕ =¡õ98-6-30¡õ= P&S Î人Á¦Ô´µç×ӹɷÝÓÐÏÞ¹«Ë¾ 7-2 1.3 ¹¦ÄÜ·½¿òͼ TLC548£¬ TLC549µÄ¹¦ÄÜ·½¿òͼÈçÏÂͼËùʾ¡£ 1.4 µäÐ͵ÈЧÊäÈë TLC548¡¢ TLC549ÔÚ²ÉÑù·½Ê½ÆÚ¼äºÍ±£³Ö·½Ê½ÆÚ¼äµÄÊäÈëµç·×迹·Ö±ðÈçÏÂÃæÁ½Í¼Ëùʾ¡£ ²ÉÑù·½Ê½ÆÚÄÚµÄÊäÈëµç·×迹 ±£³Ö·½Ê½ÆÚÄÚµÄÊäÈëµç·×迹 1.5 Òý½ÅÅÅÁÐ D »ò P ·â×°µÄ TLC548¡¢ TLC549µÄÒý½ÅÅÅÁзֱðÈçÏÂÃæÁ½Í¼Ëùʾ¡£ 1.6 ¹¤×÷ʱÐò TLC548¡¢ TLC549µÄ¹¤×÷ʱÐòÈçÏÂͼËùʾ¡£ ×¢ÊÍ£º A. ת»»ÖÜÆÚÐèÒª 36¸öϵͳʱÖÓÖÜÆÚ£¨×î´óΪ 17¦Ì s£©£¬Ëü¿ªÊ¼ÓÚ CS ±äΪµÍµçƽ֮ºó I/O CLOCK µÄµÚ 8¸öϽµÑØ£¬ÕâÊÊÓÃÓÚ¸Ãʱ¿ÌÆäµØÖ·´æÔÚÓÚ´æ´¢Æ÷ÖеÄͨµÀ¡£¡£ B. ÔÚ CS ±äΪµÍµçƽ֮ºó£¬×î¸ßÓÐЧ루 A7£©×Ô¶¯±»·ÅÖÃÔÚ DATA OUT ×ÜÏßÉÏ¡£ÆäÓàµÄ 7λ £¨ A6-A0£©ÔÚÇ° 7¸ö I/O CLOCK ϽµÑØÓÉʱÖÓͬ²½Êä³ö¡£ B7-B0ÒÔͬÑùµÄ·½Ê½¸úÔÚÆäºó =¡õ98-6-30¡õ= P&S Î人Á¦Ô´µç×ӹɷÝÓÐÏÞ¹«Ë¾ 7-3 ¶þ¡¢ÌØÐÔ 2.1 ¹¤×÷ζȷ¶Î§ÄÚ£¨×ÔȻͨ·ç£©µÄ¼«ÏÞ²ÎÊý£¨³ý·ÇÁíÓÐ˵Ã÷£© + µçÔ´µçѹ£¬ VCC£¨¼û×¢ÊÍ 1£© 6.5V ÈκÎÊäÈë¶ËÊäÈëµçѹ·¶Î§ -0.3V ÖÁ VCC+0.3V Êä³öµçѹ·¶Î§ -0.3V ÖÁ VCC+0.3V ·åÖµÊäÈëµçÁ÷·¶Î§£¨ÈκÎÊäÈë¶Ë£© ¡À 10mA ·åÖµ×ÜÊäÈëµçÁ÷·¶Î§£¨ËùÓÐÊäÈë¶Ë£© ¡À 30mA ¹¤×÷ζȷ¶Î§£¨×ÔȻͨ·ç£©£¬ TA £º TLC548C £¬ TLC549C 0¡æÖÁ 70¡æ TLC548I £¬ TLC549I -40¡æÖÁ 85¡æ ´¢´æζȷ¶Î§£¬ Tstg -65¡æÖÁ 150¡æ ÒýÏßζȣ¬ÀëÍâ¿Ç 1.6mm(1/16Ó¢´ç)£¬ 10Ãë 260¡æ + Ç¿¶È³¬³öËùÁеļ«ÏÞ²ÎÊý¿ÉÄܵ¼ÖÂÆ÷¼þµÄÓÀ¾ÃÐÔË𻵡£ÕâЩ½ö½öÊǼ«ÏÞ²ÎÊý£¬²¢²»Òâζ×ÅÔÚ¼«ÏÞ²ÎÊý Ìõ¼þÏ»òÔÚÈκÎÆäËü³¬³öÍƼö¹¤×÷Ìõ¼þÏÂËùʾ²ÎÊýµÄÇé¿öÏÂÆ÷¼þÄÜÓÐЧµØ¹¤×÷¡£ÑÓ³¤ÔÚ¼«ÏÞ²ÎÊýÌõ¼þÏµĹ¤ ×÷ʱ¼ä»áÓ°ÏìÆ÷¼þµÄ¿É¿¿ÐÔ¡£ ×¢ÊÍ 1 £ºÔÚ REF-Óë GND Á¬½ÓÔÚÒ»ÆðµÄÇé¿öÏÂËùÓеçѹֵ¾ùÏà¶ÔÓÚÍøÂçµØ¶Ë£¨³ý·ÇÁíÓÐ˵Ã÷£©¡£ 2£ºÎ¶ȵÍÓÚ-40¡æʱ£¬²»ÍƼö D ·â×°¡£ 2.2 ÍƼö¹¤×÷Ìõ¼þ TLC548 TLC549 MIN NOM MAX MIN NOM MAX µ¥Î» µçÔ´µçѹ£¬ VCC 3 5 6 3 5 6 V Õý»ù×¼µçѹ£¬ Vref+£¨¼û×¢ÊÍ 3£© 2.5 Vcc VCC+0.1 2.5 Vcc Vcc+0.1 V ¸º»ù×¼µçѹ£¬ Vref-(¼û×¢ÊÍ 3) -0.1 0 2.5 -0.1 0 2.5 V ²î·Ö»ù×¼µçѹ£¬ Vref+-Vref-(¼û×¢ÊÍ 3) 1 Vcc Vcc+0.2 1 Vcc Vcc+0.2 V Ä£ÄâÊäÈëµçѹ£¨¼û×¢ÊÍ 3£© 0 Vcc 0 Vcc V ¸ßµçƽ¿ØÖÆÊäÈëµçѹ£¬ VIH 2 2 V µÍµçƽ¿ØÖÆÊäÈëµçѹ£¬ VIL 0.8 0.8 V ÊäÈë/Êä³öʱÖÓƵÂÊ£¬ fclock(I/O)£¨¶ÔÓÚ VCC=4.75V ÖÁ 5.5V £© 0 2.048 0 2.048 MHz ÊäÈë/Êä³öʱÖӸߵçƽ£¬ tWH(I/O)(¶ÔÓÚ VCC=4.75V ÖÁ 5.5V) 200 404 ns Êä Èë / Êä ³ö ʱ ÖÓ µÍ µç ƽ £¬£¨ ¶Ô ÓÚ VCC=4.75V ÖÁ 5.5V £© 200 404 ns ÊäÈë/Êä³öʱÖÓÌø±äʱ¼ä£¬ tt(I/O)(¼û×¢ ÊÍ 4) £¨¶ÔÓÚ VCC=4.75V ÖÁ 5.5V £© 100 100 ns ת»»ÆÚÄÚ CS ÊäÈëΪ¸ß̬µÄ³ÖÐøʱ¼ä£¬ tWH(CS) £¨¶ÔÓÚ VCC=4.75V ÖÁ 5.5V £© 17 17 ¦Ì s ½¨Á¢Ê±¼ä£¬ÔÚµÚ1¸ö I/O CLOCK ֮ǰCSΪµÍµçƽ£¬ tSU(CS) £¨¶ÔÓÚ VCC=4.75V ÖÁ 5.5V £©(¼û×¢ÊÍ 5) 1.4 1.4 ¦Ì s TLC548C TLC549C 0 70 0 70 ¹¤×÷ÎÂ¶È £¨×ÔȻͨ·ç£©£¬ TA TLC548I TLCF549I -40 85 -40 85 ¡æ =¡õ98-6-30¡õ= P&S Î人Á¦Ô´µç×ӹɷÝÓÐÏÞ¹«Ë¾ 7-4 ×¢ÊÍ£º 3. ´óÓÚ¼ÓÖÁ REF+µçѹµÄÄ£ÄâÊäÈëµçѹת»»ÎªÈ«¡° 1¡±£¨ 11111111£©£¬Ð¡ÓÚ¼ÓÖÁ REF-µçѹµÄÄ£Äâ ÊäÈëµçѹת»»ÎªÈ«¡° 0¡±£¨ 00000000£©¡£ÎªÁ˹¤×÷Á¼ºÃ£¬ REF+µçѹ¸ßÓÚ REF-µçѹÖÁÉÙ 1V ¡£¶øÇÒ£¬µ±´Ë²î·Ö »ù×¼µçѹ½µÖÁ 4.75V ÒÔÏÂʱ£¬×Üʧµ÷Îó²î¿ÉÄÜÔö¼Ó¡£ 4. ÕâÊÇʱÖÓÊäÈëÐÅºÅ´Ó VIHmin½µÖÁ VILmax»ò´Ó VILmaxÉýÖÁ VIHminËùÐèµÄʱ¼ä¡£ÔÚÕý³£ÊÒθ½½ü£¬ ¶ÔÓÚÔ¶³ÌÊý¾Ý²É¼¯Ó¦Óã¨ÔÚÕâЩӦÓÃÖУ¬´«¸ÐÆ÷ºÍ A/D ת»»Æ÷·ÅÔÚÀë¿ØÖÆ΢´¦ÀíÆ÷¼¸Ó¢³ßÔ¶´¦£©£¬ÔÚÊäÈëʱ ÖÓÌø±äʱ¼äÂýÖÁ 2¦Ì sµÄÇé¿öÏÂÆ÷¼þ¿É±£³ÖÆ书ÄÜ¡£ 5. ΪÁËʹ CS ¶ËÔëÉùËùÒýÆðµÄÎó²îΪ×îС¡£ÔÚÏìÓ¦¿ØÖÆÊäÈëÐźÅÒÔÇ°£¬ÄÚ²¿µç·ÔÚ CS ¡ýÖ®ºóµÈ ´ýÄÚ²¿ÏµÍ³Ê±ÖÓÁ½¸öÉÏÉýÑØºÍ 1¸öϽµÑØ¡£ CS ½¨Á¢Ê±¼äÓÉ tenºÍ tSU(CS)ÕâÁ½¸öÖ¸±ê¸ø³ö¡£ 2.3 µçÌØÐÔ 2.3.1 ÔÚÍƼö¹¤×÷ζȷ¶Î§ÄÚ£¬ Vcc=Vref+=4.75V ÖÁ 5.5V £¬ fclock(I/O)=2.048MHz £¨ TLC548 £©»ò fclock(I/O)=1.1MHz £¨ TLC549 £©Ê±µÄµçÌØÐÔ£¨³ý·ÇÁíÓÐ˵Ã÷£© 2.3.2 ÔÚÍƼö¹¤×÷ζȷ¶Î§ÄÚ£¨×ÔȻͨ·ç£©£¬ VCC=Vref+=4.75V ÖÁ 5.5V £¬ fclock(I/O)=2.048MHz £¨ TLC548 £© »ò 1.1MHz £¨ TLC549 £©Ê±µÄ¹¤×÷ ×¢ÊÍ£º 6. ÏßÐÔ¶ÈÎó²îÊÇÔÚÕû¸ö A/D תÒÆÌØÐÔ·¶Î§ÄÚÀ뿪×î¼ÑÖ±ÏßµÄ×î´óÆ«ÀëÁ¿¡£ 7. Áã¶È£¨ zero-scale£©Îó²îÊÇ 00000000ºÍÁãÊäÈëµçѹµÄת»»Êä³öÖ®¼äµÄ²îÖµ£»Âú¶È£¨ full-scale£©Îó ²îÊÇ 11111111ÓëÂú¶ÈÊäÈëµçѹµÄת»»Êä³öÖ®¼äµÄ²îÖµ¡£ 8. ×Üʧµ÷Îó²î£¨ toal unadjusted error £©ÊÇÏßÐԶȣ¬Áã¶È£¨ zero-scale£©ºÍÂú¶È£¨ full-scale£©Îó²îÖ®ºÍ¡£ =¡õ98-6-30¡õ= P&S Î人Á¦Ô´µç×ӹɷÝÓÐÏÞ¹«Ë¾ 7-5 2.4 ²ÎÊý²âÁ¿×ÊÁÏ ²âÁ¿ÓõĸºÔص緺Ͳ¨ÐηֱðÈçÒÔϸ÷ͼËùʾ¡£ ÓÃÓÚ td¡¢ trºÍ tf²âÁ¿µÄ¸ºÔصç· ÓÃÓÚ tPZHºÍ tPHz²âÁ¿µÄ¸ºÔصç· ÓÃÓÚ tPZL ºÍ tPLZ²âÁ¿µÄ¸ºÔصç· ʹÄÜ£¨ ENABLE £©ºÍ½ûÖ¹£¨ DISABLE £©Ê±¼äµÄµçѹ²¨ÐÎ ÑÓ³Ùʱ¼äµÄµçѹ²¨ÐÎ ÉÏÉýºÍϽµÊ±¼äµÄµçѹ²¨ÐÎ ×¢ÊÍ£º A. ¶ÔÓÚ TLC548£¬ CL=50pF £»¶ÔÓÚ TLC549£¬ CL=100pF ¡£ CL °üÀ¨¼Ð¾ßµçÈÝ¡£ B. ten=tPZH»ò tPZL £¬ tdis=tPHZ»ò tPLZ¡£ C. ³ýÁ˱»Êä³ö¿ØÖƽûֹʱ֮Í⣬²¨ÐÎ 1ÊÊÓÃÓÚÊä³öΪµÍµçƽµÄÄÚ²¿Ìõ¼þϵÄÊä³ö¡£ ³ýÁ˱»Êä³ö¿ØÖƽûֹʱ֮Í⣬²¨ÐÎ 2ÊÊÓÃÓÚÊä³öΪ¸ßµçƽµÄÄÚ²¿Ìõ¼þϵÄÊä³ö¡£ Èý¡¢Ó¦ÓÃ×ÊÁÏ ¼ò»¯Ä£ÄâÊäÈë·ÖÎö ÀûÓÃͼ 1µÄµÈЧµç·£¬Ä£ÄâÊäÈëµçÈÝ´Ó 0³äµçÖÁ VS£¨ÔÚ 1/2LSB Ö®ÄÚ£©ËùÐèµÄʱ¼ä¿ÉÍƵ¼ÈçÏ£º µçÈݳäµçµçѹÓÉÏÂʽ¸ø³ö£º VC=VS£¨ 1-e-tc/RtCi£© £¨ 1£© ÆäÖУº Rt=RS+rI Àë VS 1/2LSB µÄ×îÖÕµçѹÓÉÏÂʽ¸ø³ö£º VC £¨ 1/2LSB £©=VS-£¨ VS/512£© £¨ 2£© ʹʽ£¨ 1£©ºÍʽ£¨ 2£©ÏàµÈ²¢Çó½âʱ¼ä tc¸ø³ö£º =¡õ98-6-30¡õ= P&S Î人Á¦Ô´µç×ӹɷÝÓÐÏÞ¹«Ë¾ 7-6 VS-£¨ VS/512£©=VS£¨ 1-e-tc/RtCi£© £¨ 3£© ºÍ tc(1/2LSB)=Rt¡Á Ci¡Á ln(512) £¨ 4£© Òò´Ë£¬ÔÚ¸ø¶¨ÊýÖµµÄÇé¿öÏ£¬Ä£ÄâÊäÈëÐźŽ¨Á¢Ê±¼äΪ tc(1/2LSB)=(RS+1k ¦¸) ¡Á 60pF ¡Á ln(512) £¨ 5£© ´Ëʱ¼ä±ØÐëСÓÚʱÐòͼÖÐËùʾµÄת»»Æ÷²ÉÑùʱ¼ä¡£ VI=ANALOG IN ¶ËµÄÊäÈëµçѹ VS=ÍⲿÇý¶¯Ô´µçѹ RS=Ô´µç×è ri=ÄÚ²¿µç×è Ci=µÈЧÊäÈëµçÈÝ + Çý¶¯Ô´ÒªÇó£º ¡¤Ô´µÄÔëÉùºÍʧÕæ±ØÐëÓëת»»Æ÷µÄ·Ö±æÂÊÏ൱ ¡¤ÔÚÊäÈëƵÂÊÉÏ RS±ØÐëΪʵÊý ͼ 1 °üÀ¨Çý¶¯Ô´µÄµÈЧÊäÈëµç· ËÄ¡¢¹¤×÷Ô­Àí TLC548 ºÍ TLC549 ¶¼ÊÇÔÚµ¥¸öоƬÄÚµÄÍêÉƵÄÊý¾Ý²É¼¯ÏµÍ³¡£Ã¿Ò»¸öÆ÷¼þ°üº¬ÄÚ²¿ÏµÍ³Ê±ÖÓ£¬²ÉÑùºÍ ±£³Ö£¬ 8λ A/D ת»»Æ÷£¬Êý¾Ý¼Ä´æÆ÷ÒÔ¼°¿ØÖÆÂß¼­µç·¡£ÎªÁËÌá¸ßÁé»îÐԺͷÃÎÊËٶȣ¬Æ÷¼þÓÐÁ½¸ö¿ØÖÆÊäÈ룺 I/O CLOCK ºÍоƬѡÔñ£¨ CS £©¡£ÕâЩ¿ØÖÆÊäÈëºÍÓë TTL ¼æÈÝµÄ 3̬Êä³öÒ×ÓÚÓë΢´¦ÀíÆ÷»òСÐͼÆËã»úµÄ´® ÐÐͨÐÅ¡£Æ÷¼þ¿ÉÔÚ 17 ¦Ì s »ò¸ü¶Ìʱ¼äÄÚÍê³Éת»»¡£ TLC548 ÿ 22 ¦Ì s Öظ´Ò»´ÎÍêÕûµÄÊäÈë-ת»»-Êä³ö £¨ input-conversion-output£©ÖÜÆÚ£¬ TLC549ÿ 25¦Ì sÖظ´Ò»´ÎÊäÈë-ת»»-Êä³öÖÜÆÚ¡£ ÄÚ²¿ÏµÍ³Ê±ÖÓºÍ I/O CLOCK ¶ÀÁ¢Ê¹ÓÃÇÒ²»ÐèÒªÈκÎÌض¨µÄËٶȻò¶þÕßÖ®¼äµÄÏàλ¹Øϵ¡£ÕâÖÖ¶ÀÁ¢ÐÔ¼ò »¯ÁËÆ÷¼þµÄÓ²¼þºÍÈí¼þ¿ØÖÆÈÎÎñ¡£ÓÉÓÚÕâÖÖ¶ÀÁ¢ÐÔºÍϵͳʱÖÓµÄÄÚ²¿²úÉú£¬¿ØÖÆÓ²¼þºÍÈí¼þÖ»Ðè¹ØÐÄÀûÓà I/O ʱÖÓ¶Á³öÏÈǰת»»½á¹ûºÍÆô¶¯×ª»»¡£ÄÚ²¿ÏµÍ³Ê±ÖÓÒÔÕâÖÖ·½Ê½Çý¶¯×ª»»µç·ÒÔ±ã¿ØÖÆÓ²¼þºÍÈí¼þ²»ÐèÒªÉæ¼° ´ËÏîÈÎÎñ¡£ µ± CS Ϊ¸ßµçƽʱ£¬ DATA OUT ´¦ÓÚ¸ß×è״̬ÇÒ I/O CLOCK £¨ I/O ʱÖÓ£©±»½ûÖ¹¡£µ±Ê¹ÓÃÁíÍâµÄ TLC548 ºÍ TLC549Æ÷¼þʱ£¬ÕâÖÖ CS ¿ØÖƹ¦ÄÜÔÊÐí I/O CLOCK ÓëÆä¼ÆÊý²¿¼þ£¨ counterpart £©¶Ë¹²ÓÃͬÑùµÄ¿ØÖƵ㡣 µ±Ê¹Óöà¸ö TLC548ºÍ TLC549Æ÷¼þʱ£¬ÕâÒ²ÓÃÓÚʹËùÐèµÄ¿ØÖÆÂß¼­¶ËΪ×îÉÙ¡£¿ØÖÆʱÐòÒÑÉè¼Æ³ÉʹÆô¶¯×ª »»ÓëÈ¡µÃת»»½á¹ûËùÐèµÄʱ¼äºÍ¹¤×÷Ϊ×îÉÙ¡£Õý³£¿ØÖÆʱÐòΪ£º 1. CS ±»À­ÖÁµÍµçƽ¡£ÎªÁËʹ CS ¶ËÔëÉùËù²úÉúµÄÎó²îΪ×îС£¬ÔÚʶ±ðµÍÌø±ä֮ǰ£¬ÄÚ²¿µç·ÔÚ CS ¡ýÖ® ºóµÈ´ýÄÚ²¿ÏµÍ³Ê±ÖÓÁ½¸öÉÏÉýÑØÓëÆäºóµÄϽµÑØ¡£È»¶ø£¬ÓÉÓÚ CS ÉÏÉýÑصÄ×÷Ó㬼´Ê¹Ö±µ½¾­ÀúÁË tSU(CS)ʱ ¼ä£¬ÆäÓàµÄ¼¯³Éµç·ÈÔ²»Ê¶±ðÌø±ä¡£ DATA OUT Ò²½«ÔÚ tdisÖ®ÄÚ±äΪ¸ß×è״̬¡£µ±Æ÷¼þÓÃÓÚÔëÉù»·¾³ÖÐʱ£¬ ÕâÖÖ¼¼Êõ¿ÉÓÃÀ´±£»¤Æ÷¼þʹÆäÃâÊÜÔëÉùµÄÓ°Ïì¡£µ± CS ±äΪµÍµçƽʱ£¬Ç°´Îת»»½á¹ûµÄ×î¸ßÓÐЧ루 MSB £© ¿ªÊ¼³öÏÖÔÚ DATA OUT ¶Ë¡£ 2. Ç° 4¸ö I/O CLOCK ÖÜÆÚµÄϽµÑØÊä³öÇ°´Îת»»½á¹ûµÄµÚ 2¡¢µÚ 3¡¢µÚ 4ºÍµÚ 5¸ö×î¸ßÓÐЧλ¡£ÔÚ I/O =¡õ98-6-30¡õ= P&S Î人Á¦Ô´µç×ӹɷÝÓÐÏÞ¹«Ë¾ 7-7 CLOCK µÚ 4 ¸ö¸ßµçƽÖÁµÍµçƽµÄÌø±äÖ®ºó£¬Æ¬ÄÚ²ÉÑùºÍ±£³Öµç·¿ªÊ¼¶ÔÄ£ÄâÊäÈë²ÉÑù¡£²ÉÑù²Ù×÷Ö÷Òª°üÀ¨ ÄÚ²¿µçÈÝÆ÷³äµçµ½Ä£ÄâÊäÈëµçѹµÄµçƽ¡£ 3. ÆäºóÔÙ°ÑÈý¸ö I/O CLOCK ÖÜÆÚ¼ÓÖÁ I/O CLOCK ¶Ë£¬ÔÚÕâЩʱÖÓÖÜÆÚµÄϽµÑØ£¬µÚ 6¡¢µÚ 7ºÍµÚ 8¸ö ת»»Î»±»ÒƳö¡£ 4. ×îºó£¨µÚ 8¸ö£©Ê±ÖÓÖÜÆÚ±»¼ÓÖÁ I/O CLOCK ¡£´ËʱÖÓÖÜÆڸߵçƽÖÁµÍµçƽµÄÌø±äʹƬÄÚ²ÉÑùºÍ±£³Ö µç·¿ªÊ¼±£³Ö¹¦ÄÜ¡£±£³Ö¹¦ÄÜÔÚ½Ó×ÅËĸöÄÚ²¿ÏµÍ³Ê±ÖÓÖÜÆÚÄÚ¼ÌÐø½øÐУ¬ÔÚ´ËÖ®ºó±£³Ö¹¦ÄܽáÊøÇÒÔÚÏÂÃæ 32 ¸öϵͳʱÖÓÖÜÆÚÄÚÍê³Éת»»£¬×ܹ²Îª 36¸öÖÜÆÚ¡£ÔÚµÚ 8¸ö I/O CLOCK ÖÜÆÚÖ®ºó£¬ CS ±ØÐë±äΪ¸ßµçƽ£¬·ñ Ôò I/O CLOCK ±ØÐë±£³ÖµÍµçƽ´ïÖÁÉÙ 36 ¸öϵͳʱÖÓÖÜÆÚÒÔ¹©±£³ÖºÍת»»¹¦ÄܵÄÍê³É¡£ÔÚ¶à¸öת»»ÖÜÆÚÄÚ CS ¿É±£³ÖµÍµçƽ¡£ÔÚ¶à¸öת»»ÖÜÆÚÄÚʹ CS ±£³ÖµÍµçƽʱ±ØÐëÌرð×¢Òâ·ÀÖ¹ I/O CLOCK ÏßÉϵÄÔëÉùÉÁ ±ä¡£Èç¹ûÔÚ I/O CLOCK ÉÏ·¢ÉúÉÁ±ä£¬ÄÇôÔÚ΢´¦ÀíÆ÷/¿ØÖÆÆ÷ºÍÆ÷¼þÖ®¼äµÄ I/O ʱÐò½«Ê§È¥Í¬²½¡£´ËÍ⣬Èç ¹û CS ±äΪ¸ßµçƽ£¬ÄÇôËü±ØÐë±£³Ö¸ßµçƽֱÖÁת»»½áÊøΪֹ¡£·ñÔò£¬ CS µÄÓÐЧ¸ßµçƽÖÁµÍµçƽÌø±ä½«Òý Æð¸´Î»£¬ËüʹÕýÔÚ½øÐеÄת»»Ê§°Ü¡£ ÔÚ 36 ¸öϵͳʱÖÓÖÜÆÚ·¢Éú֮ǰ£¬Í¨¹ýÍê³É²½Öè 1 ÖÁ 4 ¿ÉÒÔÆô¶¯ÐµÄת»»£¬Í¬Ê±ÕýÔÚ½øÐеÄת»»ÖÐÖ¹¡£ ´Ë²Ù×÷²úÉúÏÈÇ°µÄת»»½á¹û¶ø²»ÊÇÕýÔÚ½øÐеÄת»»½á¹û¡£ ¶ÔÓÚijЩӦÓã¬ÖîÈçѡͨ£¨ strobing £©Ó¦Óã¬ÐèÒªÔÚÌض¨µÄʱ¼äµãÆô¶¯×ª»»¡£´ËÆ÷¼þÄÜÊÊÓ¦ÕâЩӦÓᣠËäȻƬÄÚ²ÉÑùºÍ±£³ÖÔÚµÚ 4¸öÓÐЧ I/O ʱÖÓÖÜÆڵĸºÑØ¿ªÊ¼²ÉÑù£¬µ«ÊÇÖ±µ½µÚ 8¸öÓÐЧ I/O ʱÖÓÖÜÆڵĸº±ß ÑØ֮ǰ£¬±£³Ö¹¦Äܲ¢²»¿ªÊ¼¡£ËüÓ¦µ±¿ªÊ¼ÓÚ±ØÐëת»»Ä£ÄâÐźŵÄ˲¼ä¡£ TLC548/TLC549¼ÌÐø²ÉÑùÄ£ÄâÊäÈ룬 Ö±µ½ I/O ʱÖÓµÄµÚ 8¸öϽµÑØΪֹ¡£È»ºó¿ØÖƵç·»òÈí¼þÁ¢¼´À­µÍ I/O CLOCK ²¢Æô¶¯±£³Ö¹¦ÄÜÒÔ¼°ÔÚËùÐèµÄ ʱ¼äµã±£³ÖÄ£ÄâÐźŲ¢¿ªÊ¼×ª»»¡£ µÂÖÝÒÇÆ÷¹«Ë¾ÒÑ×¼±¸ºÃÓйØÓë´ó¶àÊýͨÓÃ΢´¦ÀíÆ÷½Ó¿ÚµÄÏêϸ×ÊÁÏ£¬¿É¹©Ê¹Óᣠһ¡¢¸ÅÊö 1.1 Ò»°ã˵Ã÷ 1.2 Ìصã 1.3 ¹¦ÄÜ·½¿òͼ 1.4 µäÐ͵ÈЧÊäÈë 1.5 Òý½ÅÅÅÁÐ 1.6 ¹¤×÷ʱÐò ¶þ¡¢ÌØÐÔ 2.1 ¹¤×÷ζȷ¶Î§Äڵļ«ÏÞ²ÎÊý 2.2 ÍƼö¹¤×÷Ìõ¼þ 2.3 µçÌØÐÔ 2.3.1 ÔÚÍƼö¹¤×÷ζȷ¶Î§ÄڵĵçÌØÐÔ 2.3.2 ÔÚÍƼö¹¤×÷ζȷ¶Î§ÄڵŤ×÷ÌØÐÔ 2.4 ²ÎÊý²âÁ¿×ÊÁÏ Èý¡¢Ó¦ÓÃ×ÊÁÏ ËÄ¡¢¹¤×÷Ô Àí