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Lab 8 – Sequential Circuits

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Lab 8 – Sequential Circuits

Jason Woytowich

November 11, 2005

- November 11 – Sequential Circuits
- November 18 – Review Final Project
- November 25 – Thanksgiving, no class
- December 2 – Final Project Due

- Build a 4-bit parallel input shift register.
- There are two control inputs ‘Load’ and ‘Shift’
- One clock
- 4 Parallel inputs and 1 serial output

X0

X1

X2

X3

Out

Load

Shift

The clock is not shown

- Completely describe the needed function.
- Choose how to implement it. Mealy vs. Moore.
- Draw state transition diagrams and assign a representation to the states.
- From your diagram create a table of inputs, states, next states, and outputs.
- From the table determine the combinational logic needed.

- Build and test a 4-bit counter with synchronous reset and enable count inputs.