Data Memory Access - MCQs with answers

Data Memory Access - MCQs with answers

1. What happens when the RD signal becomes low during the read cycle?

a. Data byte gets loaded from external data memory to data bus
b. Address byte gets loaded from external data memory to address bus
c. Data byte gets loaded from external program memory to data bus
d. Address byte gets loaded from external program memory to address bus

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2. Which among the below mentioned memory components possessess the potential of generating an ALE signal for the latching purpose of lower address byte in an external data memory ?

a. CPU
b. Data Bus
c. Port 0
d. Port 1

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3. Which ports assist in addressing lower order and higher address bytes into the data bus simultaneously, while accessing the external data memory?

a. Port 0 & Port 1 respectively
b. Port 1 & Port 2 respectively
c. Port 0 & Port 2 respectively
d. Port 2 & Port 3 respectively

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