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Digital Electronics - The 8051 Microcontroller

Exercise : The 8051 Microcontroller - General Questions
31.
This program code will read data from port 0 and write it to port 2, and it will stop looping when bit 3 of port 2 is set:
STAT: MOV A, PO
 MOV P2,A
 JNB P2.3, STAT
True
False
Answer: Option
Explanation:
No answer description is available. Let's discuss.
32.
Which of the following commands will move the value at port 3 to register 2?
MOV P2, R3
MOV R3, P2
MOV 3P, R2
MOV R2, P3
Answer: Option
Explanation:
No answer description is available. Let's discuss.
33.
The number of data registers is:
8
16
32
64
Answer: Option
Explanation:
No answer description is available. Let's discuss.
34.
When the 8051 is reset and the EA line is LOW, the program counter points to the first program instruction in the:
internal code memory
external code memory
internal data memory
external data memory
Answer: Option
Explanation:
No answer description is available. Let's discuss.
35.
The designs of a centigrade thermometer and a PWM speed-control circuit can be implemented by the 8051.
True
False
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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