... a3a2a 1 a0 S bát phân S thp lc phân0 1 23456789 10 11 12 13 14 15 000000 01 0 010 0 011 010 0 010 1 011 0 011 1 10 00 10 01 1 010 10 11 110 0 11 01 111 0 11 11 00 01 020304050607 10 11 12 13 14 15 16 17 0 1 23456789ABCDEFng ... 1 0 1 0 0 1 1 0 1 1 1 20 0 1 1 0 1 1 0 0 0 1 0 0 1 0 1 30 1 0 0 0 1 1 1 0 1 1 0 0 1 0 0 40 1 0 1 1 0 0 0 0 1 1 1 1 1 0 0 50 1 1 0 1 0 0 1 0 1 0 1 1 1 0 1 60 1 1 1 1 0 1 0 0 1 0 0 1 1 1 1 ... 1 30 1 0 0 0 1 1 1 0 1 0 0 4 1 0 1 1 1 0 0 0 1 0 1 1 5 1 1 0 0 1 1 0 0 1 0 1 0 6 1 1 0 1 1 1 0 1 1 0 0 1 7 1 1 1 0 1 1 1 0 1 0 0 0 8 1 1 1 1 1 1 1 1 1 1 1 1 9ng 1. 4: BCD t nhiên và mã Gray.BCD...