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QWhich signal is used to differentiate input/output (I/O) accesses from normal memory cycles in Z80?

ID: #10470 Embedded System 90 views
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#10470Q ID
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Embedded SystemTopic
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  • A HALT ✔ ✖
  • B RESET ✔ ✖
  • C MREQ ✔ ✖
  • D IORQ ✔ ✖
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Explanation

Z80 processes input/output operations in a similar way as memory cycles. To differentiate them, the IORQ signal is used which is activated along with the RD (read) or WR (write) signal during I/O operations. These operations occur only when an I/O instruction is executed.

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