MCS-51????????????洢??RAM?????
???????洢????128???
8051??????????RAM????256??????????????256????????書???????????????128???(??????00H??7FH)???128???(??????80H??FFH)???????????128????????????
???????
8051????4???????????8????浥?(???8)?????鶼??R0??R7????浥????????????????????????м?????????????????????ò??????漲??????????ü???????????й??????????4????ü??????????RAM??00H??1FH????????
?????????CPU?????????е????????????????????????????????????????????顣??????????飬?????????????PSW??RS1??RS0λ???????????????
??ü?????CPU???????洢??????????????????????????????????????????ü?????????????????????????????????????????????????????Щ???????????????????????????????
λ????
???RAM??20H??2FH??????????????RAM???????????????????????????????λ????λ?????????????????λ??????λ????????16??RAM???????128λ??????00H??7FH??MCS-51???в?????????????????λ??????????????????????洢???????λ????????MCS-51???????????
???RAM??
?????RAM??128????У???ü??????32???????λ??????16??????????80???????????ǹ???????????RAM???????????30H??7FH???????RAM???????????κι漲??????????????????г???????????????С?
???????洢????128???
???RAM???128????ǹ?????ü????????????????80H??FFH??????Щ?????????????????涨?????????ü????(Special Function Register)???????????????????
????admin ?????????2018-05-19
