Question: 1. Why does a DRAM require two chip selects. RAS* and CAS*, whereas a static memory requires only a single CS* input?
2. It is much harder to design a DRAM system than a memory system using static RAM, What are the additional problems that the designer of DRAM modules must contend with?
3. What is a pseudomaximum? Why is the value of tRcD (RAS* low to CAS* low) a pseudo maximum value? What factors determine the minimum and maximum values of tRcD?