Codes are employed in digital systems to represent information such as numerical values and text (or characters). Consider the following four codes:
(a) Natural binary code
(b) A binary gray code
(c) BCD
(d) American standard code for information interchange (ASCII)
State which of these codes are used to represent numerical values, which ones are used to represent characters, and which ones for both numerical values and characters. Give one or more applications of these four codes in digital systems.
Using a 4 bit word, write the straight binary and gray codes for numbers from 0 to 15. For the starting value (zero), make the straight binary and gray codes identical. Write the BCD representation for the decimal values from 0 to 15.