80C51??????????????????????????????
1?????????CPU???????????????????????????????????????1~4????????????ɡ?
2??????????
CPU?????????????????????????????????????????????6??S1~S6???????????2??????????????????????λP1??????????????λP2??????
????????????12?????????S1P1??S1P2????????S6P1??S6P2????????????
3?????????????
???????????T???????????f???????????T =1/f??????????12MHZ????T=1/12??s??
??80C51??????У???????1~3??????????????????????У????????????????4??????????????????????????????????????????????????12M??????????????????12T=12??12??1 =1??s?????????????????24T=24??12??1 =2??s??
4????????????????????
???????????????4????????????????????????????????????????洢?????????4??????????4?????????????????????????????????????????
???У?INC???????????A??DPTR?????1????MOVX A??@DPTR????????DPTR??????洢??????????????A????????????????????????????????????????ɡ?
????admin ?????????2018-06-27
