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The wait state, TWait, is a extra clock cycle added to the machine cycle to allow time for external hardware to respond. During this extra cycle, none of the address, data, or control pins change state. Wait state is entered if READY is false (LOW) on the rising edge of clock following ALE. READY is sampled each rising edge of clock thereafter and wait state will not be exited until READY is true (HIGH).
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What are the ways for 8085 microprocessor to exit from wait state?
The only way to exit WAIT state on the 8085 is to assert READY. You could perform a reset, but the processor will still remain in TWAIT if READY is not true.
How wait state is generated in 8086 microprocessor?
wait state is a delay experienced by a microprocessor when accessing external memory or another device that is slow to respond. the vice versa also come into scenario. Now, to be able to access slow memory the microprocessor must be able to delay the transfer until the memory access is complete. One way is to increase the micro processor clock period by reducing the clock frequency. Some micro processors provide a special control input called READY to allow the memory to set its own memory cycle time. If after sending an address out, the microprocessor does not receive a READY input from memory, it enters a wait state for as long as the READY line is in 0 state. When the memory access is completed the READY goes high to indicate that the memory is ready for specified transfer.
What do you mean by wait state?
A wait state in computing refers to a condition where a microprocessor is held idle until it can proceed with the execution of the next instruction. This can occur due to various reasons, such as unavailability of data or resources needed to complete the current operation. Efficient management of wait states is crucial for optimizing processor performance.
What do you mean by tri state condition in a microprocessor?
tristates
What is t state in 8085 microprocessor?
A T state is one cycle of the system clock.
When a microprocessor interfaces with the peripheral or memory device the normal timing of the microprocessor may need to be altered by introducing?
When a microprocessor interfaces with a peripheral or memory device, the normal timing can be adjusted by introducing wait states. Wait states are delays inserted into the processor's operation cycle to allow slower devices sufficient time to complete their tasks, ensuring data integrity and proper communication. This adjustment helps synchronize the microprocessor's speed with that of the peripheral or memory, preventing data loss or corruption.
What is the buffer and latches of microprocessor?
latches remember the last state but buffers do not
What information is on the buses during a wait state in 8086?
During a wait state in the 8086 microprocessor, the buses are typically inactive, meaning that the data bus (D0-D15) and address bus (A0-A19) do not carry valid data or address information. Instead, the control signals may indicate that the processor is in a wait state, often due to a slower peripheral or memory device not being ready for data transfer. The processor halts its operations and waits until the required conditions are met before resuming normal function.
What is a command to the processor to wait for slower devices to catch up?
It could be called either a buffer or a wait state.
What makes the N core perform better than the traditional?
The term "N core" means that the microprocessor contains 2 or more independent CPUs instead of the single CPU in the "traditional" microprocessor. The more CPUs in the microprocessor, the more instructions it can execute per clock cycle, because the extra CPUs work in parallel and usually do not have to wait for each other.
How does a microprocessor decode?
How does a microprocessor decode?
When Interrupt service routine is executed by a microprocessor?
An Interrupt Service Routine (ISR) is executed by a microprocessor when an interrupt signal is received, indicating that a specific event requires immediate attention. The microprocessor pauses its current execution, saves the state of the interrupted task, and transfers control to the ISR to handle the interrupt. Once the ISR has completed its task, the microprocessor restores the saved state and resumes execution of the interrupted task. This mechanism allows for efficient handling of asynchronous events in real-time systems.
