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Why call instruction in 8085 microprocessor have 18 state and how its operate?
Wiki User
∙ 12y ago
CALL 16-bit memory address
of a subroutine
- It is a 3-byte instruction that transfers the program sequence to a subroutine
- Saves the content of the PC (Program Counter-16-bit register) , the address of the next instruction , on the stack
- Decrements the stack pointer register by 2
- Jumps unconditionally to the memory location specified by the 2nd and 3rd bytes.
- This instruction is accompanied by a RETURN instruction in the subroutine
Wiki User
∙ 12y ago
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How many instruction are there in 8085 mp?
There are 74 instructions in the 8085 microprocessor.
How does the 8085 microprocessor instruction register work?
stores next instructions
What is NOP Instruction stands in 8085 microprocessor?
The NOP instruction is a no-operation instruction. It does nothing to the state of the machine, except to use some time. In the case of the 8085, it uses four clock cycles plus however many wait states are need to access the NOP instruction from memory.
Why is the jump instruction jmp of 8085 microprocessor given the immediate addressing mode?
because the operand is available in the instruction itself
What is the purpose of the RRC instruction in 8085 microprocessor?
We can implement "Divided by '2' " operation by using RRC.
How do you draw timing diagram for 8085 microprocessor instruction?
Refer http://wiki.answers.com/Q/How_to_draw_timing_diagram_for_8085_microprocessor_instruction
Why the name 8085 Why the name 8085 for microprocessor?
8085 is a microprocessor designed by Intel
Which instruction consume the maximum T state in its execution?
for 8085 microprocessor CALL [32-bit address] which is (unconditional ) consumes maximum(18) T states.
How many bytes are there for jump instruction in 8085?
There are 74 instructions in the 8085 microprocessor.
What are various instruction formats in 8085 microprocessor?
An instruction is a command for any given task. There are two parts to each instruction; one giving the command and two the operand.
Purpose of program counter in a microprocessor is?
In 8085 program counter stores the address of the next instruction which is to be fecthed.same function is performed by instruction pointer in 8086.
What no of instruction will be execute by using only one clock pulse in 8085 microprocessor?
There are no instructions in the 8085 that execute in only one clock pulse. The minimum number of clock cycles is four; three for instruction fetch and one for instruction decode/execute.
