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By: a guest on Nov 24th, 2013  |  syntax: None  |  size: 0.33 KB  |  views: 33  |  expires: Never
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  1. 4M x 8 = L x W
  2.  
  3. BYTE-ADDRESSABLE:
  4.  
  5. 4M = 4 x 2^20
  6.    = 2^2 x 2^20
  7.    = 2^22
  8.    = 22 bits
  9.    
  10. WORD-ADDRESSABLE:
  11.  
  12. 16-bit word size:
  13. = 22 - log 2 (16/8)
  14. = 22 - log 2 (2)
  15. = 22 - 1
  16. = 21 bits
  17.  
  18. 32-bit word size:
  19. = 22 - log 2 (32/8)
  20. = 22 - log 2 (4)
  21. = 22 - 2
  22. = 20 bits
  23.  
  24. Formula: Byte-addressable bits - log 2 (word size/Width)
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