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Worksheets8051 EMP-1
Total questions: 10
Worksheet time: 2mins
DPTR
data pointer-16 bit register
data pointer-8 bit register
data transmitter
data transmitter and receiver
PSW
program status word-8 bit flag register
program status word-16 bit flag register
program signal word
priority signal word
8051 internal ROM size
2kb
4kb
1kb
5kb
8051 series has how many 16 bit registers?
2
3
1
0
When 8051 wakes up then 0x00 is loaded to which register?
PSW
SP
PC
None of the above
How are the status of the carry, auxiliary carry and parity flag affected if the write instruction
MOV A,#9C ADD A,#64H
CY=0,AC=0,P=0
CY=1,AC=1,P=0
CY=0,AC=1,P=0
CY=1,AC=1,P=1
How are the bits of the register PSW affected if we select Bank2 of 8051?
PSW.5=0 and PSW.4=1
PSW.2=0 and PSW.3=1
PSW.3=1 and PSW.4=1
PSW.3=0 and PSW.4=1
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
On power up, the 8051 uses which RAM locations for register R0- R7
00-2F
00-07F
00-7F
00-0F
How many bytes of bit addressable memory is present in 8051 based microcontrollers?
8 bytes
32 bytes
16 bytes
128 bytes
