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标题: ???????à????×?????????????????-zt [打印本页]

作者: zing 时间: 2006-6-22 17:25 标题: ???????à????×?????????????????-zt

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?????ó?§MOTOROLA MCU????????????

[?? ??] ??×???????????????????·??????÷????·×·×???¨?à???????????§?·??????????????????·?·????????è?ó????????×?????????????±????×?????à????×????????????????í×????????ê?????????????ó×???????????Motorola?????ú?????????????????????ü???????????ì??????????????·?????·??????????÷?????????°?????????ó????????
[???ü×?] ?à??????Motorola?????ú???ì???????????ó????
????·??à?? G123 TP45
[Abstract] As the developing of the educational information technique?? many academy take great effort on building multimedia network educational environment??Accord with the education demand?? we developed a kind of embedded center control system??The article pays much attention to the theory of multimedia center control?? and then emphasizes on key technique witch take the Motorola SCM as core?? such as extending storage??audio and video switching matrix ??and the incepting ??analysis and emission of infrared remote control code??
[Keyword] multimedia Motorola SCM Infrared remote control matrix switching
1 ????
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2 ?à????×????????????????í?????ü????
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?????????à????·???????????????·?????????·??è±??????? 1?ù????MPU?¨?÷???í?÷????·??§?°???????è±??????????????????è±??????????úVGA??????????·??·?????????????ú???°?ú?ú????????????°??ü???¨?è?????????????????????°?±??????????????????????
??????????????×???Flash Memory ?????????????í?÷--Motorola MC68HC08GP32×÷???????????÷?????ü???±?à???????????????í???í???????ì??????????????±??????????°?????ì?????????????ê?????????????ó??????????????

作者: zing 时间: 2006-6-22 17:27

2.1 ?ì?????????÷
?ì??????·???????????±??????????????ì??????·????÷??????????±à???÷???÷???ü??·????????????±°??????????÷???????????????????????¨???¨???????ó·????????????????÷??·?·¨???????í???÷???¨PWM?????????????÷???¨PPM?????????ì?????????????í????????2?ù??????????????·????÷·????????????????°??·??ó?÷?????????÷?¨????????·??ó?ó????????????×??ó?????????í?÷???????????????????????è±???

作者: zing 时间: 2006-6-22 17:28

?ì???????????????÷°??????????ì???????????????????????÷??°???????×????????????????ó?¨?????????·????38KHZ?÷?????????÷???????????????¨?????????????ì??????????????????????·??ó???????????÷???????????????????ì???????????????÷×??????????????·??CX20106A?????? 3?ù?????ü???°??·??ó??×???????????????·ù·??ó??·????ì?¨?????????·×é??????????R1???°??·??ó?÷??·?????×è????±??ü?ó?????????÷·??ó?÷??????R2???ì?¨?÷?????????÷????×è??R3??????????????×è??C2???ì?¨??????C3????·???????Vp????????????????????????????????

作者: zing 时间: 2006-6-22 17:30

2.2 ?ì??????±à??
???°???÷?ú???÷?ú?ú?§????????????±à???°???÷????????????±ê×???????×???????????PWM??(?????í???÷????)??PPM??(?????????÷????)???°?????í????±í??1????????±í??0???ó???????í?????ù?????????????í???????ù???????í???ú±í1???????????ú±í0???ó?à?????????????ù????·?·¨±í??"0"??"1"??????tw???¨??tp0??tp1?????? 4?ù????

作者: zing 时间: 2006-6-22 17:31

???? 6?ù?????????????????????????????????????????????????????í??tw?????°???????????à??td??????????????????×é?¨tw??td????±í??????????????????????????????????????T??±í??????????T°ü?¨tw??td????·??????ù????????????????????×éT?¨tw??td????±í???÷?????????????????????ù??×é??±í??T?±??T????T????????????????????±í??
2.3 ?????????ó????
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作者: zing 时间: 2006-6-22 17:32

?????????????????????ú????CS???????????????????????·?????ó??ST???????????????·??????×??ó????ST????????????????ST??????????????DI?????????????????????ù???????????????¨??????DI???????????ò?à?????????¨????DI?????????ò???????????±????DI?????????÷?±???????à???????·???????????????ü????????????????????????????????????????????????????RESET????????????????????CS?????????????ù??????????????????×?????
2.4 VGA???ó????
VGA±ê×??????ù??CGA??EGA??±ê×????????ù???ü????????×????????????????????????????ò????TTL??×?????±??????????????????ó?ó?????????ò?????????????à???????????ó???ù????????????·????ù????VGA±ê×?????15???·D?????·??VGA???ì?????????????ù?????????????????????????ü??×???·?±?????640*480????????31HZ????????60HZ?ò70HZ???ü????????CGA??EGA????±ê×???????????CGA?¨??200????????·????????????????¨?è????????????200?????????????????????à???????????????????????ù??
MAX465???????úMAXIM?????ú?ú?????????????ü?á??????×é?¨3??????????×é?¨3???????????????????ù?·?????????·???????ü????2±????????????????????????????í??90Mhz?????????????¨??2±???????????
??±??????????÷??????VGA?????ù?????????????????????í??????????????MAX465??????????????
2.5 ???????í?÷
Motorola???????????ú?????°???????ú??×?????8???????ú???????????????????????????·???à?????à???????ò???????????÷?????÷??±í???????¨?????ò?×????????????·???????????????·?????????
MC68HC08GP32????HC05±à????????????512×???RAM??32,256×???Flash Memory??????I/O????????????????????????I/O????????????I/O????????×???PWM?¨Pulse-Width Modulation???????????±?±??RTC???????????????à??????16???¨?±?÷/?????÷????????????×???????±???????????×???Watchdog ?à????????
2.5.1????EEPROM????
???????????????????ó???è?????????????????????§?????????????è??????EEPROM?????????ü?????±?¨?è?????????????ú?ó???????????ò??????24C32A?????ù??I2C??4K*8??????????/??EEPROM???ü??????????×???????????????????????8????????7?ù????????????????EEPROM??
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??7 EEPROM????
?????????÷?????????????????????ú?á???±???????¨SCL????????×???????/????????8?ù??????????????????°?°ü?¨??????×????????????÷??????8?????·×?????????8?????·×???????/???????????????÷????/??????????·?????????

??8 24C32??/??????
2.5.2??????×???????±???
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MC68HC08GP32???????÷?÷???????????????????é??????????×????????é?????à?????????????????????????±????????·??ú?ò????·??ú±????±???????¨????????×???????·??ú???????¨??????±??¨???????¨????±??????????????????????¨?±?÷??×??????¨??????±??ó??°?×????????????÷?±?°????????????????×??????÷??????????????×??????????÷???è?¨???í??????×??????????????ú?ú??????????×??????????????????í?í??????????????·??ú???±???ò????·??ú±??????±????

??9 ??????×????í ????????????????????????10 ????±??????í
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????????×????é?à??????MC68HC08GP32????????????±??????????é?????ü????????·??????·???????±????????????10?ù?????????é?????????¨???±???????è??????????16??×????????????÷????????????????????????±????????÷????±??????????±???????????±?ò??????±??????é?????¨?±?÷?¨????×??????????????÷???????????¨?????????????????¤?????¨???????????ù???¨??????????±????????÷???????????????????????????¨?????????????????é?????·?????????¨????????????
2.5.3?????í???è??
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3 ?á????
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