CSE 140L Hardware Lab Three

Registers and Counters

Due date: Nov. 18, 1999

Objective

In this lab, we will learn how to build different types off Registers and different 2 types of Counters.

Part 1. 16-bit Register

Build a 16-bit register.

i.	Design the 16-bit Register using D flip-flop and briefly describe what a 16-bit register does and how it works.
ii.	Build and simulate the circuit using xilinx.
iii.	Demonstrate your circuit to the TA: ______________________

Part 2. Shift Register

Build a 8-bit Shift register.

i.	Design the Shift Register using D flip-flop and briefly describe what a 8-bit shift register does and how it works.
ii.	Build and simulate the circuit using xilinx.
iii.	Demonstrate your circuit to the TA: ______________________

Part 3. Ripple Counter

Build a 4 bit ripple counter that will count from 0000 to 1111 and starts the sequence again.

i.	Design the Ripple Counter using J/K flip-flop. Briefly describe your design using a timing diagram. With the same design, you can't simply replace the J/K flip-flop and put a D flip-flop to obtain the same result. Why not? What additional logic do you need to add around the D-FF so it will work as a counter?
ii.	Build and simulate the J/K flip-flop ripple counter circuit using xilinx.
iii.	With the same design, you can't simply replace the J/K flip-flop and put a D flip-flop to obtain the same result. Why not? What additional logic do you need to add around the D-FF so it will work as a counter?

Part 4. Synchronous Counter

Build a 4 bit synchronous counter that will count from 0000 to 1111 and starts the sequence again.

i.	Design the Synchronous Counter using J/K flip-flop. Briefly describe your design. What is the advantage and disadvantage using synchronous counter as compare to ripple counter.
ii.	Build and simulate the circuit using xilinx.

Report
Title page:

Names of students and due date.
Title of the lab and objective.
A brief description of each person's contribution.

Content:

Part 1 i, ii, iii
Part 2 i, ii, iii
Part 3 i, ii, iii
Part 4 i, ii
Reminder: Once again, think of yourself as the grader but doesn't have the hand out. The grader should know what you did in the lab without looking at the hand out. Note, "briefly describe your design" should include the circuit and perhaps highlighting the wires to describe your point.

Verification:

Attach the lab assignment (this handout) at the end of the lab report with the TA verification.

Grading

90% will based on the completeness and correctness of the report. 10% will based on the neatness, organization, and following instruction of the report format.