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The X86 Microprocessors: Architecture and Programming (8086 to Pentium), 1st Edition
book

The X86 Microprocessors: Architecture and Programming (8086 to Pentium), 1st Edition

by Lyla B. Das
May 2024
Intermediate to advanced content levelIntermediate to advanced
665 pages
23h 2m
English
Pearson India
Content preview from The X86 Microprocessors: Architecture and Programming (8086 to Pentium), 1st Edition
MEMORY AND I/O DECODING 227
Example 7.1
How many address and data lines are needed for the memory chips with the following
organization?
256 i) × 4
512 ii) × 8
1K iii) × 16
32 K iv) × 8
128 K v) × 8
Solution
256 i) × 4 means, it has 4 data lines, and 256 memory locations, each of width 4 bits. 256 = 2
8
.
us, 8 address lines are needed.
512 ii) × 8
is chip has 8 data lines.
512 = 2
9
.
us, it has 9 address lines.
1 K iii) × 16.
is chip has 16 data lines.
1 K = 1024 = 2
10
.
It has 10 address lines to access each of the 16-bit data words.
32 K iv) × 8
It has 8 data lines.
32 K = 2
5
× 2
10
= 2
15.
It has 15 address lines
128 K v) × 8
It has 8 data ...
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Publisher Resources

ISBN: 9781282663169