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8051 series of micro controllers are made by which of the following companies?
AT89C2051 has RAM of:
8051 series has how many 16 bit registers?
When 8051 wakes up then 0x00 is loaded to which register?
When the micro controller executes some arithmetic operations, then the flag bits of which register are affected?
How is the status of the carry, auxiliary carry and parity flag affected if write instruction
How are the bits of the register PSW affected if we select Bank2 of 8051?
If we push data onto the stack then the stack pointer
On power up, the 8051 uses which RAM locations for register R0- R7
How many bytes of bit addressable memory is present in 8051 based micro controllers?
DJNZ R0,label is how many bit instruction?
JZ, JNZ, DJNZ, JC, JNC instructions monitor the bits of which register ?
Calculate the jump code for again and here if code starts at 0000H
When the call instruction is executed the top most element of stack comes out to be
LCALL instruction takes
Are PUSH and POP instructions are a type of CALL instructions?
What is the time taken by one machine cycle if crystal frequency is 20MHz?
Find the number of times the following loop will be executed
What is the meaning of the instruction MOV A,05H ?
Does the two instructions mean the same?
total questions: 133

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