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???p?????λ??·
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????λ?????????臨λ????????????????λ???????????????δ????????????????????????????????????λ?????????????????????λ?????
???a?????????·???趨????????????????9013?????RST?????????VCC???????????VT???RST??????????VT=0.7V(R1+R2)/R1??
???b??????????????趨????????????????????(a)??VT=Vz+0.7V??
???c???????????????????λ??·??
??p???ж????????
?????a???????????R2??R3??????ж??/INT0?????ж????????????/INT0????????????????????????????????????????/INT0?????????
???b?????????????3.6V???????????????????????????ж?????·??????
??p?????????о?
??1?????????????о???????????HT70XX??д??????????λ??·??
??2?? ????????????????MAX810x????????HT70XX????·?????????????λ????????
??3???????????λ?????????еMAX812??
??4?????????????????????????MAX707/708??
???p???????λ??WDR???????????????WDT??
??????????о?DS1232?p MAX813
????admin ?????????2018-04-20
