Which signal is used to differentiates the access from a normal memory cycle?(a) HALT(b) RESET(c) MREQ(d) IORQThe question was posed to me in an international level competition.I'd like to ask this question from Microprocessor of Embedded System in portion Embedded System of Embedded Systems

Which signal is used to differentiates the access from a normal memory

1.	Which signal is used to differentiates the access from a normal memory cycle?(a) HALT(b) RESET(c) MREQ(d) IORQThe question was posed to me in an international level competition.I'd like to ask this question from Microprocessor of Embedded System in portion Embedded System of Embedded Systems
Answer» Right option is (d) IORQ The EXPLANATION: The IORQ signal is used to DIFFERENTIATE the access from a normal MEMORY CYCLE. These input/output accesses are similar from a hardware perspective to a memory cycle but only occur when an input/output PORT instruction is executed.

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Which signal is used to differentiates the access from a normal memory cycle?(a) HALT(b) RESET(c) MREQ(d) IORQThe question was posed to me in an international level competition.I'd like to ask this question from Microprocessor of Embedded System in portion Embedded System of Embedded Systems

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