Address Line Decoding

Decoding

We often used signal lines to decide which address was active in a chip. To use this type of information with logical gates we need to decode it into address signaling lies - one line for each unique address.. This process is called decoding.

Here we show that sequence or 2 address lines producing 4 possible active signals in separate address signaling lines.

Decoding to Produce 4 Useful Signals from 2 Address Signaling Lines

This decoding of addresses must be done locally, using a small set of address signaling wires for providing particular address signals for using those particular address areas. If you decode the entire address line with 20 bit addressing, that would require 1,048,576 individual signaling lines.

The Animated Computer

Dr. Jerome Heath