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Worksheetsinterfacing-1
Total questions: 20
Worksheet time: 10mins
Addressing Of Internal RAM is --------.
(00-0F)H
(00-1F)H
(00-7F)H
None of the above
The address of General purpose register is -------.
(00-0F)H
(00-1F)H
(00-7F)H
None of the above
Address of bit addressable area is ----------.
(00-0F)H
(00-1F)H
(20-2F)H
None of the above
Which pin is used to access External memory
PSEN
EA
ALE
RST
ALE pin is used to
Multiplex address & Data lines
Demultiplex address & Data lines
None of the above
In serial communication data is send as-------bit at a time
8
2
1
16
Most reliable Data communication
serial
parallel
The 2 pins used for data communication in MC 8051
(a)
In which serial communication method the bytes are separated by START & STOP bits
Asynchronous
Synchronous
The size of SCON register
8 bit
16 bit
2 bit
1 bit
How many modes are there in the serial data communication in MC8051
1
2
3
4
An alternate function of port pin P3.4 in the 8051 is:
Timer 0
Timer 1
Interrupt 0
Interrupt 1
The 8051 has __ 16 bit counter /timer
1
2
3
4
The TMOD register is __ bit register
2
4
8
16
What is the function of the SCON register?
to control SBUF and SMOD registers
to program the start bit, stop bit, and data bits of framing
to control SMOD registers
none of the mentioned
How can we control the speed of a stepper motor?
by controlling its switching rate
by controlling its torque
by controlling its wave drive 4 step sequence
Can't be controlled
How can the direction of the DC motor be changed?
by changing the torque
by changing the switching speed
by changing the polarity of voltages connected to the leads
None of the mentioned
The ADC0804 has ________ resolution.
4 bit
8 bit
32 bit
64 bit
How many rows and columns are present in a 16*2 alphanumeric LCD?
rows=2, columns=32
rows=4, columns=16
rows=2, columns=64
rows=2, columns=16
If the microprocessor has 10 address lines then the number of memory locations it is able to address is
512
1024
2048
none
