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assume an led connected to a pin of micro.if anode connect to micro and cathode connect to gnd it is source mode.if cathode connect to micro and anode connect to vcc it is sink mode.
connect your keypad to 74923,then out put interrupt of this must be connected to micro.when you press any key micro goes to interrupt routin , then you can read output of 74923.
I have an idea but i dont know it's usefull for you:
Φ=XY;
Φ/τ-Φ×(S-G)=aΦ;
then: YX"+XY'=aXY;
X"/X+Y"/Y=a;
X"/X=m1;Y"/Y=m2;that m1+m2=a;
you can discuss about m1,m2,and boundary condition.
avr vs pic
I think PICs are suitable for control electronic device but AVRs are suitable for processing (for example dsp or registerical process).In PICs pin controling is easy and in AVRs register controlling is easy .
I THINK YOU CAN FIND ANY THING ABOUT E1 IN WWW.ITU-T.COM . YOU CAN SIGN UP AND RECEIVE 3 DOCUMENTS .BEFORE , YOU MUST FIND SUITABLE DOCUMENTS FOR YOUR DECIDES .
hi
I have a circuit by mt9075 , i give clock source from CPLD ( xc95144) and initialize it by PIC18F452 . I decided to change mt9075 to mt 9076 ( for low power and change all supply to 3.3 v ) , but now it dosn't be sync . if anybody has experience work by mt9076 , I thank , if say me , have...
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