Tutorial 7: Memory part 1

Note

This is for practice, not for marks. Treat this as additional study material to help you develop your knowledge and skills on these topics. During the tutorial session, the TA will explain how to solve these problems.

Question 1

Consider a main memory built with SDRAM chips. Data are transferred in bursts as shown in the figure below, except that the burst length is 8. Assume that 32 bits of data are transferred in parallel. If a 400-MHz clock is used, how much time does it take to transfer:

  1. 32 bytes of data

  2. 64 bytes of data

What is the latency in each case?

../_images/burstRead.png

Question 2

Describe a structure similar to that in the below figure for a 16M × 32 memory using 1M× 4 memory chips.

../_images/memStructure.png