Arrange following interrupts in order of polling (checking interrupt conditions) after every instructions. A. Serial Interrupt B. External 1 Interrupt C. Timer 1 Interrupt D. External 0 Interrupt Choose the correct answer from the options given below :
D, B, C, A
To arrange the interrupts in order of polling, we need to understand the interrupt priority in an 8051 microcontroller-based system. The 8051 microcontroller has a set of interrupts that are prioritized based on a fixed internal polling sequence. Here's how it works:
- External 0 Interrupt (INT0): This is the highest priority interrupt. It is generally used for external device requests.
- Timer 0 Interrupt: Although not listed in the options, it's worth mentioning for understanding. This interrupt is used for Timer 0 overflow.
- External 1 Interrupt (INT1): This has a lower priority than Timer 0 but is prioritized after the non-listed interrupts.
- Timer 1 Interrupt: This interrupt is for Timer 1 overflow. It occurs after External 1 Interrupt.
- Serial Interrupt: This interrupt has the lowest priority among those listed. It is used for serial communication requests.
Following this order, the given options can be assessed. Based on the 8051's priority rules, the interrupts should be arranged as:
- D. External 0 Interrupt
- B. External 1 Interrupt
- C. Timer 1 Interrupt
- A. Serial Interrupt
Thus, the correct sequence that matches the 8051 polling order is D, B, C, A, which corresponds to the correct answer from the options.
Therefore, the correct answer is: D, B, C, A.
Similar Questions
Given below are two statements :
Statement I : In 8051 micro-controller register banks and stack reserves 32 bytes from locations 00 to 1F Hex
Statement II : Bit-Addressable RAM locations are 20 H to 2 F H.
In the light of the above statements, choose the most appropriate answer from the options given below :
Find the delay generated by Timer 0 in the following code of 8051 microcontroller : clock period = 1.085 µs.
MOV TMOD, #01H
MOV TLO, #3DH
MOV THO, #0A2H.
SET B TRO
Loop : J N B TFO, LOOP
CLR TRO
CLR TFO
In "JZ Next" instruction of 8051 microcontroller, which register's content is checked to see if it is zero?
Using 8051 assembly language programming numbers 54 H and 98 H are added. After addition the status of CY, AC and P flags are respectively:
In 8051 microcontroller, one machine cycle lasts in 12 oscillation period. Crystal oscillator's frequency is 11.0592 MHz. Find how long it takes to execute instruction MOV R4, # 25.
Advantage of segmented memory in 8086 is
A. Allows the memory capacity to be 1M byte, although the actual address is of 16 bit size.
B. Allows the placing of code and data portions of the same program in different parts of memory.
C. Allows the memory capacity to be 2M byte, although the actual address is of 16 bit size.
D. Allows the placing of code and data portion of the same program in same parts of memory.
E. Allows the memory capacity to be 1M byte, although the actual address is of 20 bit size
Choose the correct answer from the options given below :
Which of the following statements are correct for a microcontroller ?
A. A microcontroller has on-chip I/O ports
B. A microcontroller has a fixed amount of RAM on the chip
C. The flag register in the 8051 is called program standard word
D. Auxiliary carry flag is set when there is a carry from D3 to D4 during an ADD or SUB operation
E. Overflow flag is only used to detect errors in unsigned arithmetic operations.
Choose the correct answer from the options given below :
Match List I with List II
LIST I (instruction of 8051 microcontroller) LIST II (Addressing mode) A. MOV A, # 32 H I. Register addressing mode B. MOV R 6, A II. Register Indirect addressing mode C. MOV R4, 7 FH III. Immediate Addressing mode D. MOV A, @ RO IV. Direct Addresing mode Choose the correct answer from the options given below:
The ALE line of an 8085 microprocessor is used to
Contents of ‘A’ register after execution of the following 8085 microprocessor program is
MVI A, 55 h
MVI C, 25 h
ADD C
DAA
Important Questions from Microprocessors
Register which is used to store values of arithmetic and logical operations is termed:
How many bytes of bit addressable memory is present in 8051 based microcontrollers?
A single instruction to clear the lower four bits of the accumulator in 8085 assembly language is-
In Microprocessor 8085 Address/Data buffer is a/an _______ buffer.
Microprocessor 8085 operates on a clock cycle with ______ duty cycle.
