Zero Wait State (ZWS)

What is Zero Wait State (ZWS)?

Zero wait state is a specific condition of the computer system that signifies it is running at the maximum speed and is not waiting for the system memory and other slower components in it.

In other words, it refers to the condition where data is transferred immediately, when it is accessed, without waiting for one or more of the machine cycles to respond to it.

Understanding Zero Wait State (ZWS)

What is Zero Wait State (ZWS)

Zero wait state refers to a specific feature of the microprocessor in a computer system or its architecture due to which it does not have to wait to access the memory.

This is because, in the zero wait state, the processor performs at a higher speed than the system memory.

This means that there is no idle state in the processor and it can perform incessantly.

Ideally, to facilitate zero wait by a zero wait state memory, a simple Random Access Memory (RAM) interface, the RAM block is created from a solitary word-wide RAM. This typically comes with a byte write control.

A specific and direct connection is established with this RAM block and the Tightly Coupled Memory (TCM) interface. This ensures that the DRWAIT is low.

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So, a zero wait state is a condition where the memory controller of the computer system takes very little time to complete the request of reading data from or writing it to a specific address after its receipt.

This means that the performance of the system is faster as it does not have to enter into an idle or wait state.