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Explain the functions of following pins of 8086 microprocessor in maximum mode. a). TEST b). RQ/GT0 c). LOCK d). QS0 and QS1 e). S0, S1, S2
written 7.1 years ago by gravatar for meghalikalyankar meghalikalyankar • 2.3k •   modified 6.2 years ago
microprocessors and peripherals
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written 7.1 years ago by gravatar for meghalikalyankar meghalikalyankar • 2.3k

a): ¯TEST:

  • It is an active low input line dedicated for 8087 Co-processor. It is used in Maximum Mode whenever the Co-Processor is busy it makes this pin HIGH. µP samples the ¯TEST input only when it encounters the WAIT instruction.
  • If the ¯TEST pin is high, the µP enters …

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