# Electronics Communication/Signal Processing/Signal Encoding and Decoding/BCD

From Wikibooks, open books for an open world

## BCD[edit]

BCD stands for Binary Coded Decimal . BCD coding uses 4 bit binary numbers to represent a number from 0 - 9

## BCD Coding[edit]

With 4 bits binary numbers we have 2 to the power of 4 or 16 combinations with each combination serves as a code for a number

- '0000' which can be used to represent number "0"
- "0001" which can be used to represent number "1"
- "0010" which can be used to represent number "2"
- "0011" which can be used to represent number "3"

- "0100" which can be used to represent number "4"
- "0100" which can be used to represent number "5"
- "0100" which can be used to represent number "6"
- "0100" which can be used to represent number "7"

- "1000" which can be used to represent number "8"
- "1000" which can be used to represent number "9"
- "1000" which can be used to represent number "10" as "A"
- "1000" which can be used to represent number "11" as "B"

- "1100" which can be used to represent number "12" as "C"
- "1100" which can be used to represent number "13" as "D"
- "1100" which can be used to represent number "14" as "E"
- "1100" which can be used to represent number "15" as "F"