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Servicing Personal Computers, 3rd Edition
book

Servicing Personal Computers, 3rd Edition

by Michael Tooley
May 2014
Intermediate to advanced content levelIntermediate to advanced
320 pages
13h 41m
English
Newnes
Content preview from Servicing Personal Computers, 3rd Edition
Microcomputer systems 31
Table 1.3 shows the truth table for the address lines and decoding logic of the memory
device. This table assumes that the most significant part of the address (high order) appears first
and is decoded to the appropriate row while the least significant (low order) part appears
second and is decoded to the appropriate column. The table shows the logic states for three
address locations: 0, 255, and 16 383 (0000H, 00FFH, and 3FFFH respectively).
Table 1.3 Multiplexed address decoding for a typical memory cell matrix
Order
High
Low
High
Low
High
Low
A6 A5 A4 A3 A2 A1 AO
0 0 0 0 0 0 0
0 0 0 0 0 0 0
0 0 0 0 0 0 1
111111
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Publisher Resources

ISBN: 9781483193670