51????????????????Щ??8051????????????????
51?????????????????
·8λCPU·4kbytes ????洢??(ROM) (52?8K)
·256bytes??????洢??(RAM) (52??384bytes??RAM)
·32??I/O????·111?????????????????
·21????ü????
·2????????/??????·5???ж????2???????(52??6??)
·???????????????
·??????洢????????64kB
·??????洢????????64kB
·???????λ??????·??????40PinDIP???
·???+5V???????
CPU????????????????????????????ж????????????????????;
RAM????????????д???????????????м?????????????????????????;
ROM????????????Щ??????????;
I/O??????8λ????I/O????????????????????????;
T/C?????????/???????????????????????????????????????;
????ж?????ж??????;
???????UART(??????????????)?????I/O????????????????????????????????????;
?????????????????·????????????????????????????????12M??
????admin ?????????2018-05-19
