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Immediate addressing mode in 8085 Microprocessor
In this mode, the 8/16-bit data is specified in the instruction itself as one of its operand. For example MVI E, ABH: means ABH is copied into register A. Here the operand is immediately available in the instruction.
MVI E ABH
| Before | After | |
|---|---|---|
| (A) | Any value | ABH |
As example, if we consider instruction MVI E, ABH then it means that ABH will be moved or copied to the register E. And, as a result, the previous value of E will get overwritten.
| Address | Hex Codes | Mnemonic | Comment |
|---|---|---|---|
| 2000 | 1E | MVI E, ABH | E ← ABH |
| 2001 | AB | ABH as operand |
This instruction will have seven T-states as shown below.
Summary − So this instruction MVI E, ABH requires 2-Bytes, 2-Machine Cycles (Opcode Fetch and Memory Read) and 7T-States for execution as shown in the timing diagram.
Updated on: 26-Jun-2020
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