Microprocessor
Download as PPTX, PDF0 likes36 views
To perform operations with a microprocessor, instructions must specify the operation, data sources, and result destination. The Intel 8085 uses several addressing modes including direct addressing, register addressing, register indirect addressing, immediate addressing, and implicit addressing. Direct addressing specifies the operand address in the instruction itself. Register addressing uses register pairs to specify operands. Immediate addressing embeds the operand in the instruction. Implicit addressing operates on the accumulator without an explicit operand address.
1 of 10
Download to read offline
More Related Content
What's hot (20)
Ad
Similar to Microprocessor (20)
Ad
More from DEPARTMENT OF PHYSICS (20)
Recently uploaded (20)
Microprocessor
- 3. To perform any operation , we have to give the corresponding instruction to the microprocessor` In each instruction , programmer has to specify 3 things ; Operation to be performed Address of sources of data Address of destination of result
- 4. Each instruction requires certain data on which it has to operate. Intel 8085 uses the following addressing modes Direct Addressing Register Addressing Register Indirect Addressing Immediate Addressing Implicit Addressing
- 5. Direct Addressing The address of the operand (data) is given to the instruction itself . Example STA 2400H
- 6. Register Addressing The Operand is in one of the general purpose register or accumulator Op code specifies the address of the register Ex MOV A,B 78
- 7. Register Indirect Addressing Operand specified by a register pair EX LXIH,2500H
- 8. Immediate Addressing The operand specified within the instruction itself Ex MVI A,05
- 9. Implicit Addressing These are certain instructions which operate on the content of the accumulator. Such instructions do not require the address of the operand Ex CMR,RAL,RAR
- 10. Thank you