After completing Exercise, modify your test bench to discover and display all 8-bit polynomials that yield maximum-length sequences. How many are there?
Exercise 1
After completing Exercise, try to guess another polynomial that yields a maximum-length sequence. Use your test bench to determine whether each guessed polynomial works.
Exercise 2
Write a VHDL or Verilog program for an 8-bit LFSR counter. Use a constant POLY to define the bit pattern for the polynomial, but use the 8-bit polynomial in Table 8-26. Also write a test bench for your program that proves that your counter visits 255 states before repeating. (Hint: In the test bench, use an array of 256 bits to keep track of which states have been visited.)
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