MICROPROCESSOR 8255
ARCHITECTURE OF 8085
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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data bus control
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read logic control
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control word register
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operational command word register
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Detailed explanation-1: -Explanation: The parallel input-output port chip 8255 is also known as programmable peripheral input-output port. Explanation: Port C can function independently either as input or as output ports. Explanation: By programming the bits of control word register, the operations of the ports are specified.
Detailed explanation-2: -Answer: d Explanation: RD(ACTIVE LOW), WR(ACTIVE LOW), A1, A0, RESET are the inputs provided by the microprocessor to the read/write control logic of 8255.
Detailed explanation-3: -We call the mode 0 as the simple Input Output or the basic Input Output for performing the simplest mode of operation. Every ports of 8255 can be programmed to work in mode 0. We call mode 1 as the strobed Input Output or handshake Input Output.