The address space in ARM is ______

Concept:

Let a = number of address wires (width of the address bus)

d = number of data wires (width of the data bus)

The total addressed capacity(number of memory locations) in bytes is given by:

Memory Locations  = 2^a

Observation:

• By increasing the width of the address bus, more memory locations can be directly addressed.
• Each time the width is increased by one wire, the address capacity is doubled.
• ARM processors normally have a 32-bit address bus.
• A 32-bit ARM processor could address up to 2³² memory locations, i.e. the addressable capacity is 2³² bytes ( 4 Gigabytes of memory)