21. SRAM vs DRAM
SRAM is faster compared to DRAM
SRAM consumes less power than DRAM
SRAM uses more transistors per bit of memory
compared to DRAM
22. SRAM vs DRAM Cont.
SRAM is more expensive than DRAM
Cheaper DRAM is used in main memory while
SRAM is commonly used in cache memory
DRAM Required Refresh cycle
DRAM Required EDC Circuit
23. ROM Memory
Mask ROM - Mask Read Only Memory
PROM - Programmable Read Only Memory
EPROM - Erasable Programmable Read Only
Memory
25. ROM Memory
Programmable by special program tools/modes
Read only memory during normal use
Non-volatile
EPROM uses UV light to reset all bits
36. Selection Check Point
Most writes must be preceded by an erase
operation
NAND has smaller erase units for fewer erases
in less time
NOR is an XIP device
