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WorksheetsMicrocontroller 8051
Total questions: 15
Worksheet time: 8mins
To select Register Bank 1, RS1-RS0 Should be
0 0
0 1
1 0
1 1
Program Counter in 8051 is
8 bit wide
16 bit wide
20 bit wide
Name the following image
Program Status Work (PSW)
Program Status Word (PSW)
Program Serial Word (PSW)
Peripheral Status Word (PSW)
How many SFR registers are present in memory
10
12
11
21
what is PROGRAM COUNTER (PC)?
holds the address of memory,where next executable instruction placed
holds the data of memory
16- bit register
it is a memory pointer
EA is held _____ , to access external ROM
High
Low
High Impedance State
None
which port is used only for INPUT/OUTPUT operation?
PORT 0
PORT 1
PORT 2
PORT 3
8051 microcontrollers are manufactured by which of the following companies?
Atmel
Philips
Intel
All of the mentioned
Which of the following comes under the indexed addressing mode?
MOVX A, @DPTR
MOVC @A+DPTR,A
MOV A,R0
MOV @R0,A
Name the type of SWAP A instruction
Arithmetic instruction
Data Transfer
Branch Instruction
Logical Instruction
Give the internal RAM size in 8051.
8-bit
1-Byte
4 KB
128 Byte
Identify the port by its architecture.
P1
P0
P3
P2
Consider the following program. Assume that internal memory 30h contains 5h.
org 0h
mov r2,#30h
mov a,@r2
add a,r2
end
Choose the right answer
Syntax Error
Accumulator will contain 35h
Not able to access internal memory
None
If we push data onto the stack then the stack pointer
increases with every push
decreases with every push
increases & decreases with every push
none of the mentioned
PIN number of Vcc (supply)?
1
20
40
10
