Read-only memories (ROMs)

• 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

inputs

outputs

n address lines

2n wordlines

decoder

• • •

• • •

memoryarray(2n wordsby m bits)

Previous slide

Next slide

Back to first slide

View graphic version