Question Discussion & Solution

MCQ

The serial port interrupt is generated if

RI is set

RI and TI are set

Either RI or TI is set

RI and TI are reset

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MCQ

If the external interrupt sources control the flags IE0 and IE1, then the interrupt programmed is

level-sensitive

edge-sensitive

in serial port

in parallel port

Discussion

MCQ

The 8051 stack is

auto-decrement during PUSH operations

auto-increment during POP operations

auto-decrement during POP operations

auto-increment during PUSH operations

Discussion

MCQ

In serial port interrupt, after the control is transferred to the interrupt service routine, the flag that is cleared is

RI and TI

None

Discussion

MCQ

Among the five interrupts generated by 8051, the highest priority is given to the interrupt

IE0

TF1

TF0

IE1

Discussion

MCQ

The step involved in PUSH operation is

increment stack by 2 and store 8-bit content to address pointed to by SP

decrement stack by 1 and store 16-bit content to address pointed to by SP

increment stack by 1 and store 8-bit content to address pointed to by SP

store 8-bit content to address pointed to by SP and then increment stack by 1

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Microprocessor Basics

Classification

Input Output interfacing

Microcontroller

8085 Architecture

8086 Microprocessor

Multiprocessor Configuration

Peripheral Interface

Register Set of 8051

Serial Communication Unit

Segmentation

Paging

Instruction Set of 8086 8088

Interrupt and Stack of 8051

8051 Instruction Set

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