RAM 芯片的容量为 1024 个字，每个字为 8 位(1K × 8)。从 1K × 8 RAM 构建 16K × 16 RAM 所需的带有使能线的 2 × 4 解码器的数量为
(一) 4
(乙) 5
(三) 6
(四) 7答案：(乙)
解释：
RAM chip size = 1k ×8[1024 words of 8 bits each]
RAM to construct =16k ×16
Number of chips required = (16k x 16)/ ( 1k x 8)
= (16 x 2)
[16 chips vertically with each having 2 chips
horizontally]
So to select one chip out of 16 vertical chips,
we need 4 x 16 decoder.
Available decoder is 2 x 4 decoder
To be constructed is 4 x 16 decoder
Hence 4 + 1 = 5 decoders are required.这个问题的测验