scan signal from C0 to C3 into the signal in order of 1000-gt; 0100- gt; 0010- gt; 0001- gt; 1000 cycle, when the scanning signal to 1000, then scanning 0 line of four keys. Scanning signal for 0100, then scanning resolution a line of four buttons, and so on. if a button is pressed, R3 ~ R0 the output signal will be one to one, but we are unable to confirm which a key is pressed, we must proceed from R3 ~ R0 with the output signal of C0 to C3

Packet : 55593411dsfs.rar filelist
dsfs
dsfs\bcd_bin2(7).cnf
dsfs\bcd_bin2(8).cnf
dsfs\bcd_bin2(9).cnf
dsfs\bcd_bin2(10).cnf
dsfs\bcd_bin2(11).cnf
dsfs\bcd_bin2(12).cnf
dsfs\bcd_bin2(13).cnf
dsfs\bcd_bin2(14).cnf
dsfs\bcd_bin2(15).cnf
dsfs\bcd_bin2(16).cnf
dsfs\bcd_bin2(17).cnf
dsfs\bcd_bin2(18).cnf
dsfs\bcd_bin2(19).cnf
dsfs\bcd_bin2(20).cnf
dsfs\bcd_bin2.fit
dsfs\bcd_bin2.hex
dsfs\bcd_bin2.hif
dsfs\bcd_bin2.ndb
dsfs\bcd_bin2.pin
dsfs\bcd_bin2.pof
dsfs\bcd_bin2.rpt
dsfs\bcd_bin2.snf
dsfs\bcd_bin2.sof
dsfs\bcd_bin2.vhd
dsfs\bcd_bin2.acf
dsfs\bcd_bin2.cnf
dsfs\bcd_bin2.mmf
dsfs\bcd_bin2.ttf
dsfs\BCD_BIN2.sym
dsfs\bcd_bin2(1).cnf
dsfs\bcd_bin2(2).cnf
dsfs\bcd_bin2(3).cnf
dsfs\bcd_bin2(4).cnf
dsfs\bcd_bin2(5).cnf
dsfs\bcd_bin2(6).cnf

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