MCQs on 8051 Microcontroller Architecture – PhysicsTeacher.in

Last updated on March 10th, 2022 at 04:25 pm

MCQ on 8051 Microcontroller Architecture (page 3/4)

11) Which of the following addressing mode is not usable in the XCH instruction of the 8051 microcontrollers?

a) Direct addressing
b) Indirect addressing
c) Register addressing
d) Immediate addressing

12) How many interrupt sources 8051 can handle?

a) 3
b) 4
c) 6
d) 5

13) Of the 128-byte internal RAM of the 8051 microcontroller, how many bytes are bit addressable?
a) 4 bytes
b) 16 bytes
c) 32 bytes
d) 64 bytes

14) Which of the following is true, if the contents of PSW is 16H?

a) Program uses registers from bank3
b) Carry flag set to 1
c) program uses registers from bank2
d) Program uses registers from bank0

15) How many 16 bit timers/counters present in 8051 microcontroller?
a) 8
b) 4
c) 2
d) 1

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