EE481 Logical Design Lab
Fall 2003, Lab #5

Prelab Questions

1. Describe implementation and application differences of 74373 and 74374 chips. Why (or where) would you choose one over the other?
2. How would you measure data transfer rate for a design that you are suppose to implement in the experiment section?
3. Show the design of SR Flip Flop using a D Flip Flop.
4. Show the design of T Flip Flop using a SR Flip Flop.
5. Show the design of JK Flip Flop using a SR Flip Flop.
6. Synthesize the following circuit with D flip flops:
   

   

Experiments

1. Design and implementation of a parallel interface for a PC.
   • Calculate required drop resister values for the 7-segment display.
   • Design one-way data transmission interface (see Figure below).
   • Implement the interface using TTL logic devices.
2. How fast the transfer rate for your PC?

NOTE-1: Check out the following timing diagram to see how data transfer and control signal events occur during a session. You may also use this diagram to answer prelab questions.

NOTE-2: You may want to use a Binary-Editor to create your own data to shape characters at the display. An editor called xed is loaded into every PC in the lab for this purpuse.

NOTE-3: Unexpected malfunctioning in your circuit may fry the PC's parallel port which makes all the computer unusable. To reduce the amount of damage, a buffer card as a protection interface will be provided. So, use provided card to protect the PC from unexpected events.

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