??????е?????
???????·?????????????????????????????????????????????????????????????????????????????????????????
1???????????DB??Data Bus??
????????????????????????????????????????AT89S52?У?????????????8λ???????ò??????????
2??????????AB??Address Bus??
AT89S52????????????????16λ??????????A0~A15?????????
=65536????????????0000H~FFFFH??
3???????????CB??Control Bus??
???????????????????????????????????????????????????????????????·??????????
????admin ?????????2019-06-23
