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I/O Module Functions Quiz

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Questions and Answers

What is the major function of device communication in an I/O module?

Detects and reports transmission errors

Coordinates the flow of traffic between internal resources and external devices

Performs the needed buffering operation to balance device and memory speeds

Involves commands, status information, and data (correct)

Which function of an I/O module involves command decoding, data, status reporting, and address recognition?

Processor communication (correct)

Error detection

Data buffering

Control and timing

What is the primary purpose of data buffering in an I/O module?

Performs the needed buffering operation to balance device and memory speeds (correct)

Detects and reports transmission errors

Involves command decoding, data, status reporting, address recognition

Coordinates the flow of traffic between internal resources and external devices

In programmed I/O, what does the processor issue to an I/O module to execute the instructions?

I/O commands containing the address of the desired device Signup and view all the answers

How is each I/O device connected through I/O modules identified?

Given a unique identifier or address Signup and view all the answers

What is the key characteristic of memory-mapped I/O?

A single address space for memory locations and I/O devices Signup and view all the answers

What is the role of each I/O module in programmed I/O?

Interpret the address lines to determine if the command is for itself Signup and view all the answers

Study Notes

I/O Module Functions

The major function of device communication in an I/O module is to facilitate data exchange between the processor and external devices.
The function of an I/O module that involves command decoding, data, status reporting, and address recognition is referred to as control and interface.

Data Buffering

The primary purpose of data buffering in an I/O module is to hold data temporarily while it is being transferred between the processor and external devices.

Programmed I/O

In programmed I/O, the processor issues a command or instruction to an I/O module to execute the instructions.
The role of each I/O module in programmed I/O is to manage the data transfer between the processor and external devices.

I/O Device Identification

Each I/O device connected through I/O modules is identified by a unique address.

Memory-Mapped I/O

The key characteristic of memory-mapped I/O is that the I/O devices are treated as if they were part of the memory, and the processor uses the same instructions to access both memory and I/O devices.

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Description

Test your knowledge about the major functions of an I/O module, including control and timing, processor communication, device communication, data buffering, and error detection.