COAC Quizzes Continued

What do you get in R5 after the followoing instruction is executed in MSP430? MOV @R3+ R5

-1

There are only two addressing modes for the destination operand in MSP430, namely register direct and index addressing

True

False

Shift operations in MSP430 can be implemented in rotation instructions with carry. Which of the following instructions must be executed before rotations?

BIS

ADD

CLRC

JMP

Which of the following symbols indicates indirect register addressing in MSP430 assembly programming?

A program may be executed directly in an interpreter with compilation

True

False

Which of the following is false?

#1234h indicates an immediate value following the instruction using @PC+ addressing

#Label indicates a PC relative addressing which is offset(PC) index addressing

Immediate addressing (#) indicates value that comes with the instruction

PC relative addressing implements PIC (position independent code)

Which of the following takes longer execution time than others?

Indirect register

Index addressing

Indirect autoincrement

Which of the following is used for asynchronous I/O?

Memory map

Interrupt

Buffering

Timer

Which of the following is/are the principle of low power design?

Peripherals should be switched on only when needed

Use low-power integrated peripheral modules in place of software driven functions

Avoid frequent subroutine and function calls due to overhead

For longer software routines, single-cycle CPU registers should be used.

All of the above

Which of the following is true?

An instruction is executed in one clock cycle

The execution of an instruction requires one machine cycle

A machine cycle requires a fixed number of clock cycles

CPU speed is measured by machine cycles

Which of the following generates lowest clock in MSP430?

XT1

XT2

VLO

DCO

Which of the following is a piece of code executed for an interrupt request?

Interrupt service routine

Interrupt vector

Subroutine

Function

Which of the following will wake up CPU from sleep modes?

I/O

ALU

Instruction

Interrupt

Which type of interrupt is "access violation to flash" in MSP430?

Maskable

NMI

System reset

Global

What do you do if an ISR needs to use R4 in MSP430?

Just use it

Push it to stack before using it, and pop it out after done

Use the copy of R4 for ISR

None of the above

Which of the following is true for RETI and RET?

RETI is used for subroutine whereas RET is used for ISR

RETI pops one register whereas RET pops two registers from stack

RETI is not emulated whereas RET is emulated

None of the above

COAC Quizzes Continued

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