In 8085 Instruction set, INX SP instruction is used to increment the SP contents by 1. INX SP instruction is a special case of INX rp instruction which increases the content of the register pair. This instruction occupies only 1-Byte in memory.
|Mnemonics, Operand||Opcode(in HEX)||Bytes|
Let us consider that the initial content of SP is 4050H. So after increment of the content of SP by using INX SP instruction, SP would have the value 4051H. Here is the required tracing table as below −
|2003||33||INX SP||SP ←SP + 1|
The timing diagram against this instruction INX SP execution is as follows −
Summary − So this instruction INX SP requires 1-Byte, 1-Machine Cycle (Opcode Fetch) and 6 T-States for execution as shown in the timing diagram.