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Sequential Circuits Problems(II)
Prof. Sin-Min Lee
Department of Mathematics and Computer Science
Algorithm = Logic + Control
A Gray Code is a binary sequence where only 1 bit ever changes
between adjacent values in the sequence. Gray codes can easily be
produced from Karnaugh Maps simply by tracing a single looped
path which enters each location in the Karnaugh Map exactly once.
which gives the Gray Code
BCD Counters
A special case of an arbitrary sequence counter is that of a BCD
(Binary Coded Decimal) counter. This counter counts in decimal
from 00002 to 10012 , and then sets itself back to 0 again.