Question

- Implement 16 Byte rom by using 8 nibble roms - Implement 32 nibble rom by...

- Implement 16 Byte rom by using 8 nibble roms
- Implement 32 nibble rom by using 8 nibble roms and 2 by 4 decoder

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Answer #1

32 bit nibble is same as 16 Byte. Hence both the problems mentioned in the question are same.

A 2:4 decoder can be used to address the locations in the ROM,

Assume 8 nibble ROMs have 4 rows and 32 bits wide (32 bits is 8 nibble as 1 nibble = 4 bits)

As shown , 32 bit data lines from each ROM constitutes 8 nibbles.

Total 4 ROMs sharing common address lines and control signals like chip select , read signal will provide 32 nibbles data at a time

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