In a microcomputer WAIT states are used to:

In a microcomputer WAIT states are used to:
1). Make the processor wait during the DMA operation
2). Make the processor wait during a power interrupt processing
3). Make the processor wait during a power shutdown
4). Interface slow peripherals to the processor

• Computer microprocessors generally run much faster than the computer's other subsystems
• When the processor needs to access external memory, it starts placing the address of the requested information on the address bus
• It then must wait for the answer, each of the cycles spent waiting is called a wait state
• Thus, wait states helps to interface slow peripherals to the memory

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