1胛双4选1数据选择器实刃优码转换 B 1)8421BCD转换为余三码B00110 0000X1 输入 输出 8421BcD码 余三码 110 B3B2BB。A3A2A1Ao10ox 000010011 B,B, A3 B3 B 0001101 00BB 00011110BB00011110 0001X0 001010 0 01 0100X0 001110 1010 11 0XX 11100XX 010010 0 01 111 01 10 0 100 0 1111 1100001 0XX 1011×X B, B2 A2 BB00011110 0011X1 0100×0 00 00110 1010 1000X 1 回阿阿回同回同阿回回同同呵≯會（1)8421BCD转换为余三码 输入 8421BCD 码 B 3 B 2 B 1 B 0 0 0 0 0 0 0 0 1 0 0 1 0 0 0 1 1 0 1 0 0 0 1 0 1 0 1 1 0 0 1 1 1 1 0 0 0 1 0 0 1 输出 余三码 A 3 A 2 A 1 A 0 0 0 1 1 0 1 0 0 0 1 0 1 0 1 1 0 0 1 1 1 1 0 0 0 1 0 0 1 1 0 1 0 1 0 1 1 1 1 0 0 0 1 X X 0 1 X X 0 1 X 1 0 0 X 1 00 01 11 10 00011110BB3 2 BB1 0 A3 1 0 X X 1 0 X X 1 0 X 1 0 1 X 0 00 01 11 10 00011110BB3 2 BB1 0 A2 0 0 X X 1 1 X X 0 0 X 0 1 1 X 1 00 01 11 10 00011110BB3 2 BB1 0 A1 1 1 X X 0 0 X X 0 0 X 0 1 1 X 1 00 01 11 10 00011110BB3 2 BB1 0 A0