What is bcd number system

The first binary number system was documented by Gottfried Leibniz in the 17th century. The binary numbering system use a base of 2 whereas the decimal numbering system use a base of When the binary number is 0, then the number is off, when the binary number is 1, then the number is on. The following is an example of binary digits and how they represent decimal digits:. Binary-Coded Decimal vs. Binary to Decimal Conversion. BCD: Binary: However, for the same decimal number, the BCD form representation will be like this: 9, 6, 2, 0 equals this BCD value: 1, 2, 0 equals this BCD value: 4, 5, 6, 8 equals this BCD value: BCD Applications.

Electronic Circuits. Electronic circuits and systems can be divided into two types of circuits, analog and digital.

A binary number system will use both of these two states. Check back with us soon for more automation control topics. The RealPars Team. Search for:. By Wally Gastreich. Automation Engineer. Posted on Feb 24, Checkout your email. Have questions? Sign in. Method statement for civil works. Binary coded decimal. Start online business in What to Upload to SlideShare. Related Books Free with a 30 day trial from Scribd. Elsevier Books Reference. Germany, September Elsevier Books Reference.

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What is BCD? What is BCD Binary coded decimal BCD is a system of writing numerals that assigns a four-digit binary code to each digit 0 through 9 in a decimal base numeral. This may be accomplished by packing the BCD numbers.

In a packed BCD number, each nibble has a weighted position starting from the decimal point. Therefore, instead of requiring 4 bytes to store the BCD number , we would only require 2 bytes, half the storage.

Therefore, our previous example would be:. Let's develop the algorithm to Pack a BCD number. Register C contains the lower byte of the BCD number.