Massachusetts Institute of Technology
Department of Electrical Engineering and Computer Science
6.195 - How to Really Design Digital Systems

Problem Set 1 Issued - September 4, 1997

Due (in class): September 7, 1997

Reading

Assigned Text on Vhdl

Chapter 1
Chapter 2
Chapter 3 Sections 3.1 through 3.3.2 pp. 105 - 112

Problem 0

Get a computer account on the sunpals in the digital lab, 38-600. This gets you an account on the HP computers in the digital lab. Fix up your .cshrc.me on the HP computers. See that you can run galaxy on the HP computers.

Problem 1

Do exercise 1-1 on pp. 18 - 23.

Problem 2

Do exercise 2-1 on pp. 51 - 52

Problem 3

Do exercise 2-2 on pp. 71 - 74

Problem 4

Do exercise 2-3 on pp. 94 - 95

Problem 5

Do problem 2.6 on page 101.

Problem 6

Do problem 2.9 on page 102.

Problem 7

Do problem 2.12 on page 102.

Problem 8

Write an ENTITY declaration for the following:

• Port EN, LD, and CLK are input only.
  
• Port A is a 4-bit bus, input only.
  
• Port w is an output only.
  
• Port X is a 12-bit three-state bi-directional bus.
  
• Port Y is an output that is also used internally.
  
• Port Z is a three-state output.

             your_design
        +--------------------------+
        |                          |
  ------|en                       w|------
        |                          |
  ------|ld                 x[11:0]|------
        |                          |
  ------|clk                      y|------
        |                          |
  ------|a{3:0]                   z|------
        |                          |
        +--------------------------+