Microprocessors and Microcontrollers (3160914) MCQs

MCQs of 8051 Microcontroller Architecture

Showing 71 to 80 out of 89 Questions
5 6 7 8 9
71.

The transmit buffer of serial data buffer is a

(a)

serial-in parallel-out register
(b)

parallel-in serial-out register
(c)

serial-in serial-out register
(d)

parallel-in parallel-out register
Answer:

Option (b)

72.

The receive buffer of serial data buffer is a

(a)

serial-in parallel-out register
(b)

parallel-in serial-out register
(c)

serial-in serial-out register
(d)

parallel-in parallel-out register
Answer:

Option (a)

73.

The register that provides control and status information about counters is

(a)

IP
(b)

TMOD
(c)

TCON
(d)

PCON
Answer:

Option (b)

74.

The register that provides control and status information about serial port is

(a)

IP
(b)

IE
(c)

TMOD
(d)

PCON & SCON
Answer:

Option (d)

75.

The device that generates the basic timing clock signal for the operation of the circuit using crystal oscillator is

(a)

timing unit
(b)

timing and control unit
(c)

oscillator
(d)

clock generator
Answer:

Option (c)

76.

The registers that are not accessible by the user are

(a)

Accumulator and B register
(b)

IP and IE
(c)

Instruction registers
(d)

TMP1 and TMP2
Answer:

Option (d)

77.

Which of the following is an 8-bit register?

(a)

PSW(Program Status Word)
(b)

TCON(Timer Control Register)
(c)

Accumulator
(d)

All of the mentioned
Answer:

Option (d)

78.

Which of the following register can be addressed as a byte?

(a)

P1
(b)

SCON
(c)

TMOD
(d)

TCON
Answer:

Option (c)

79.

Which of the following is bit-addressable register?

(a)

SBUF
(b)

PCON
(c)

TMOD
(d)

SCON
Answer:

Option (d)

80.

The higher and lower bytes of a 16-bit register DPTR are represented respectively as

(a)

LDPTR and HDPTR
(b)

DPTRL and DPTRH
(c)

DPH and DPL
(d)

HDP and LDP
Answer:

Option (c)

Showing 71 to 80 out of 89 Questions
5 6 7 8 9