ITEC 352

Lecture 31Buses / Peripherals

Buses and Peripherals

Review

• Memory• SD Memory chips• Rambus memory• Technology versus usage

Buses and Peripherals

Objectives

• Look into the connections between components

Buses and Peripherals

Overview

Buses and Peripherals

Drill down

Buses and Peripherals

How does it work?

• Have to know when you can use the signals present

• Oscillator– Produces pulses at a certain frequency– Tuning fork

Buses and Peripherals

Synchronous

Buses and Peripherals

Asynchronous

Buses and Peripherals

Arbitration

• Who gets to use the bus?• What is inside the boxes?

Buses and Peripherals

Bridging

Buses and Peripherals

Flowchart for disk access

• What causes reading and writing from disks?• How does the bus play into it?

Buses and Peripherals

Interrupts

• What are they?• Why are they used?• How do they affect the bus?

Buses and Peripherals

DMA

• Bypassing the CPU

Buses and Peripherals

Interrupts

• Flow chart

Buses and Peripherals

Cycles

• Separate into categories• Why idle?

Buses and Peripherals

Bursting

• Doing one operation

Buses and Peripherals

Summary

• Introduction to buses• Next time– Specific devices