m924 m925 m926 m927
off off off off 的時(shí)候K1M924=K0
ON OFF OFF OFF K1M924=K1
OFF ON OFF OFF K1M924=K2
ON ON OFF OFF K1M924=K3
OFF OFF ON OFF K1M924=K4
ON OFF ON OFF K1M924=K
.... ...... .... ..... ...............
KnM是字軟元件不是位軟元件所以就是一個(gè)四位的二進(jìn)制數(shù)