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˼ϵhi3521Aѯ

time : 2020-07-30 09:30       ߣpcb

˼ϵhi3521AӲûֲ,Hi3521AоƬϲο
1.SchematicDiagramDesign
1.1ExternalCircuitsfortheSmallsystem
1.1.1ClockingCircuit
˼hi3521A
ͨHi3521Aڲ·24mhzⲿ·ϣԲϵͳʱӵ·
Hi3521Aһʵʱʱ(RTC)ΪϵRTCṩʱӵ·
Hi3521aͨ鿪ڼPOR_enableŵ״̬ѡڲλģʽⲿλģʽ
AB19֧WDGRSTNSYSRSTNOUTHi3521AʹڲλģʽʱAb19ű·ΪSYS_RSTn_OUTܡHI351AʹⲿλģʽʱAB19ű·ΪWDG_RSTnܡ
-AB19ΪWDG_RSTnܽж·ʱӵⲿ裬Ϊǿ·©(OD)
-POR_ENABLEĵƽΪߵƽʱѡڲλģʽоƬϵ֮,ڲϵ縴λ(POR)·λоƬ,AB19űΪSYS_RSTN_OUTʱźصΧ豸
-λʱ100300msڡAB19ű·ΪWDG_RSTnܡ
-ڰ弶УѡⲿλģʽʹרøλоƬλźšŹЧWDG_RSTN͵ƽָϸߵƽֱRSTNż⵽͵ƽλźšˣWDG_RSTNſӵⲿλоƬԸλϵͳ
˼ѯڵ·С:16681598897΢ͬţ