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WorksheetsMicrocontroller
Total questions: 10
Worksheet time: 8mins
8051 microcontrollers are manufactured by which of the following companies?
Atmel
Philips
Intel
All of the mentioned
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 mentioned
When the microcontroller executes some arithmetic operations, then the flag bits of which register are affected?
PSW
SP
DPTR
PC
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
00-07
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
When we add two numbers the destination address must always be.
some immediate data
any register
accumulator
memory
DAA command adds 6 to the nibble if:
CY and AC are necessarily 1
either CY or AC is 1
no relation with CY or AC
CY is 1
A microcontroller at-least should consist of:
RAM, ROM, I/O ports and timers
CPU, RAM, I/O ports and timers
CPU, RAM, ROM, I/O ports and timers
CPU, ROM, I/O ports and timers
