Microcontrollers Questions Set 24:
How many addressing modes are there is 8051 microcontroller ?
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The 8051 series microcontroller has how many 16-bit registers?
Solution:
Choose the incorrect instruction
MOV A,R3 MOV A, 65H MOVX A, @R1 MOVP A, @R2
Solution:
Which bit in PCON register is responsible for taking the microcontroller in ideal mode?
Solution:
The value to be assigned to the TMOD register to operate Timer 1 in Mode 1 is ___________.
Solution:
The instruction MOVC A, @A+DPTR accesses elements from which memory?
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In the 8051 microcontroller, which I/O ports are used to provide the address for external memory?
Solution:
#include <reg51.h>
void main(void)
{
P2 = 0;
P2 = P2 | 0X99;
P2 = ~P2;
}
What is the content in P2(in hexadecimal) after the execution of the above code?
Solution:
How are the status of the carry (CY), auxiliary carry (AC), and parity (P) flags affected by the following instructions?
MOV A, #9C
ADD A, #64H
Solution:
In 8051 microcontroller , in the multiplication of 2 numbers, if one number is present in the accumulator, then other number will be in
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