Gray Code Generator
Schematic Symbol :GrayCodGen
Simcode :12012
Definition of Gray Code:
An ordering of ‘2 raised to the power of n’ binary numbers such that only one bit changes from one entry to the next. Gray codes for 4 or more bits are not unique, even allowing for permutation (A rearrangement of elements, where none are lost, added, or changed) or inversion of bits. The term Gray code is often used to refer to a "reflected" code, or more specifically still, the binary reflected Gray code. The code is called reflected because it can be generated in the following manner as shown:
Take the Gray code 0, 1. Write it forwards, then backward: 0, 1, 1, and 0. Then pretend 0s to the first half and 1s to the second half: 00, 01, 11, and 10. Continuing, write 00, 01, 11, 10, 10, 11, 01, 00 to obtain: 000, 001, 011, 010, 110, 111, 101, 100, Each iteration therefore doubles the number of codes.
In this model the following the gray code is generated as per given the table given below:
Function of the Model
Binary values from zero to 15 are fed through the input pins of the gray code generator and the corresponding gray code value is obtained for the given binary values. In this model A3, A2, A1, A0 are the input pins. A3 is the MSB pins and A0 is LSB pin. The values for A3, A2, A1, A0 are fed by means of the clock editor.
The model can be used for the generation of gray code from binary values zero to 15.