Semiconductor Memories

Abstract

Semiconductor memories fall into two main categories, as shown in Fig. 10.1: table memories and function memories. With table memories, an address A is defined in the range

$$ 0 \leqslant A \leqslant n = 2^N - 1 $$

The word width of the address is between N = 5 and N = 22, depending on the size of memory. Data can be stored at each of the 2^N addresses. The data word width is m = 1−16 bits. Figure 10.2 shows an example for N = 3 address bits and m = 2 data bits.