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Explain the role of 8288 bus controller in maximum mode of 8086.
written 5.8 years ago by gravatar for vinayakprabhutendolkar vinayakprabhutendolkar • 220 modified 2.1 years ago by gravatar for DevarenjiniP DevarenjiniP • 3.1k
microprocessors and peripherals
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written 2.1 years ago by gravatar for DevarenjiniP DevarenjiniP • 3.1k

INTRODUCTION

• The Intel 8288 is a bus controller designed for Intel 8086/8087/8088/8089.

• The available in 20-pin DIP package.

• When 8086 (and 8088) operate in maximum mode necessary control signals are generated by the 8288. For interfacing memory and I/O devices in the maximum mode.

• The minimum mode signals, INTA, ALE, DEN, DT/ IT, M/ 10 WR , HLDA, and HOLD (on pins 24 to 31) that pins are essential for interfacing memory and I/O devices, are not available in the system if the 8086 is operated in maximum mode.

8288 BUS CONTROLLER

Provides the signals eliminated from the 8086/8088 by the maximum mode operation.

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IC 8288 INTERNAL BLOCK DIAGRAM

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PIN DIAGRAM OF 8288 BUS CONTROLLER

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8288 Bus Controller Pin Functions S,„ S, and So

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