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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