Multiple choice

Why I/O terminals in a system are normally latched while address terminals are not?

  1. I/O needs to hold the output status even after the clock address does not.

  2. Address needs to hold status after the clock I/O does not.

  3. I/O terminals are not latched.

  4. Address terminals are latched.

  5. None of the above
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A Correct answer
Explanation

Devices connected to I/O terminals are normally slower in access compared to the processor. So, data on the terminals may be available before the device accesses them. This data must remain on the terminal till device accesses it. This is possible only when the data is latched on the terminal. So, I/O are latched.

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