Read-only memory (ROM)

inputs

outputs

n address lines

2n wordlines

decoder

• • •

• • •

memoryarray(2n wordsby m bits)

• Two dimensional array of stored 1s and 0s

  • Input is an address
  • The ROM decodes all possible input addresses
  • The stored row entry is called a "word"
  • The ROM output is the decoded word

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