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Questions and Answers
What is the major function of device communication in an I/O module?
Which function of an I/O module involves command decoding, data, status reporting, and address recognition?
What is the primary purpose of data buffering in an I/O module?
In programmed I/O, what does the processor issue to an I/O module to execute the instructions?
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How is each I/O device connected through I/O modules identified?
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What is the key characteristic of memory-mapped I/O?
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What is the role of each I/O module in programmed I/O?
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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.
