What is the timing diagram of 8085?
What is the timing diagram of 8085?
Timing Diagram is a graphical representation. It represents the execution time taken by each instruction in a graphical format. The execution time is represented in T-states.
What is STA instruction?
In 8085 Instruction set, STA is a mnemonic that stands for STore Accumulator contents in memory. In this instruction,Accumulator8-bit content will be stored to a memory location whose 16-bit address is indicated in the instruction as a16. This instruction uses absolute addressing for specifying the destination.
What is STA in data transfer instructions?
8085 Data-transfer Instructions
| Opcode | Operand | Meaning |
|---|---|---|
| STA | 16-bit address | 16-bit address |
| STAX | 16-bit address | Store the accumulator indirect |
| SHLD | 16-bit address | Store H and L registers direct |
| XCHG | None | Exchange H and L with D and E |
How many T-states are required for the execution of Sta 2000h?
It requires 4 Machine cycles.
What is the timing diagram?
A timing diagram includes timing data for at least one horizontal lifeline, with vertical messages exchanged between states. Timing diagrams represent timing data for individual classifiers and interactions of classifiers. You can use this diagram to provide a snapshot of timing data for a particular part of a system.
What is the full form of Sta & LDA in 8085?
STA is for copying data from accumulator to memory location, LDA is for copying data from memory location to accumulator and.
What is the difference between LDA and STA?
LDA – Is for loading the accumulator. i.e) It is used to load the accumulator from the memory. (Data moves/will be copied from memory to accumulator ). STA – Is for storing the accumulator value to the memory location((Data moves/will be copied from accumulator to the memory ).
What is data transfer instruction of 8085?
Data transfer instructions in 8085 microprocessor
| OPCODE | OPERAND | EXPLANATION |
|---|---|---|
| STA | 16-bit address | contents at address = A |
| LHLD | 16-bit address | directly loads at H & L registers |
| SHLD | 16-bit address | directly stores from H & L registers |
| LXI | r.p., 16-bit data | loads the specified register pair with data |
How do I move data from register to memory?
Load instructions move data from memory to registers. Store instructions move data from registers to memory. Move instructions move data from one register to another….
| Instruction | Operation | |
|---|---|---|
| lw | Rd, addr | load integer (word) |
| sw | Rs, addr | store integer (word) |
| move | Rd, Rs | move integer |
| la | Rd, label | load address |
How many T states are in the memory read cycle?
Summary: So this instruction MVI M, ABH requires 2-Bytes, 3-Machine Cycles (Opcode Fetch, Memory Read, Memory Write) and 10 T-States for execution as shown in the timing diagram.
How many don’t care bits are present in flag register?
Detailed Solution. Generally the flag register of 8085 microprocessor is a 8 bit register and it contains three don’t care combinations and 5 active flags i.e. Sign Flag(S), Zero Flag (Z),Auxiliary Carry Flag(AC),Carry Flag (C) and Parity Flag(PF).
