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Digital Electronics - The 8051 Microcontroller

Exercise : The 8051 Microcontroller - General Questions
11.
The following program will receive data from port 1, determine whether bit 2 is high, and then send the number FFH to port 3:
READ: MOV A,P1
ANL A,#2H
CJNE A,#02H,READ
MOV P3,#FFH
True
False
Answer: Option
Explanation:
No answer description is available. Let's discuss.
12.
Device pins XTAL1 and XTAL2 for the 8051 are used for connections to an external oscillator or crystal.
True
False
Answer: Option
Explanation:
No answer description is available. Let's discuss.
13.
When the 8051 is reset and the line is HIGH, 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.
14.
An alternate function of port pin P3.4 in the 8051 is:
Timer 0
Timer 1
interrupt 0
interrupt 1
Answer: Option
Explanation:
No answer description is available. Let's discuss.
15.
Both registers TL0 and TL1 are needed to start Timer 0.
True
False
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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