Digital Logic Design and Application
Memory circuits:
•
Have stable states to store
circuit states;
•
Change it’s states with the
external inputs change.
5
Basic Concepts
“State”
embodies all the information about the past needed
to predict current output based on current input.
state variable, one or more bits of information.
n bit → 2
n
states
State information is stored in memory devices
Memory
Devices
Combinational
Circuits
External Input Output
Q
n
Q
n+1