What is counter and time delay in 8085 microprocessor?
The delay will be used in different places to simulate clocks, or counters or some other area. When the delay subroutine is executed, the microprocessor does not execute other tasks. For the delay we are using the instruction execution times. executing some instructions in a loop, the delay is generated.
What are counters and time delay?
2. What are Counters & Time Delays ? COUNTERS ARE USED TO KEEP TRACK OF EVENTS. TIME DELAYS ARE IMPORTANT IN SETTING UP REASONABLY ACCURATE TIMING BETWEEN TWO EVENTS.
What is counter in microprocessor 8085?
The function of the program counter is to point to the memory address from which the next byte is to be fetched. When a byte (machine code) is being fetched, the program counter is incremented by one to point to the next memory location. Stack Pointer: It is used as a memory pointer.
What are counters in microprocessor?
The Program Counter (PC) is a register structure that contains the address pointer value of the current instruction. Each cycle, the value at the pointer is read into the instruction decoder and the program counter is updated to point to the next instruction.
What is the purpose of IP register?
A special-purpose register, usually called the instruction pointer (IP) or program counter (PC), keeps track of what instruction is being executed.
What is the purpose of register?
Registers are a type of computer memory used to quickly accept, store, and transfer data and instructions that are being used immediately by the CPU. The registers used by the CPU are often termed as Processor registers.
What is the function of IP in the 8085 microprocessor?
The IP(Instruction pointer) contains the offset within the code segment of the memory. Hence CS:IP is used to point to the location (i.e to calculate the physical address)of the code in the memory.
What is difference between general purpose and SFR register?
General purpose – These do not have side effects, can be used by most instructions. One can do arithmetic with them, use them for memory addresses, and so on. Special purpose – Registers which do not have side effects, but can only be used for certain purposes and only by certain instructions.
Which register is a 16 bit special purpose register?
Stack Pointer (SP): It is a 16-bit special purpose register which always stores the address of top of the Stack. i.e. it always points to top of the Stack. Stack is a part of the memory location used to store the data temporarily.
Which register is not bit addressable?
Embedded Systems – SFR Registers
| Byte Address | Bit Address | |
|---|---|---|
| 87 | Not bit Addressable | PCON |
| 83 | Not bit Addressable | DPH |
| 82 | Not bit Addressable | DPL |
| 81 | Not bit Addressable | SP |