Two ways to think about logic signals

• Fixed logic convention

  • High voltage always means 1, TRUE, Asserted
  • Low voltage always means 0, FALSE, Negated

• Mixed Logic convention

  • Can have High and Low true signals
  • High true signals means that high voltage means 1, True, asserted
  • Low true signals means that low voltage means 1, True, asserted
  • In real world, have both high and low true signals.

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