Why the program counter in a 8085 microprocessor is a 16 bit register?

Why the program counter in a 8085 microprocessor is a 16 bit register?

The program counter acts as a pointer to the next instruction to be executed and always contains the 16-bit address of the memory location of next instruction. It is a 16 bit register as 8085 has 16 address lines.

What is the purpose of program counter in 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.

Which is a 16 bit register for 8085 microprocessor?

Stack Pointer

How many special purpose registers are there?

Three types of special-purpose registers are the instruction register, instruction pointer, and program status word. When the control unit fetches an instruction from memory, it stores it in the instruction register. The general purpose register can store a data or a memory location address.

What are the special purpose registers in 8086?

There are two special purpose registers on the 8086, i.e. the instruction pointer (ip) and the flag register. The ip is sometimes referred to as the pc (program counter). These registers cannot be accessed directly, rather, they are modified by the cpu during execution.

Which is not a special function register?

5. Which of the following is not a special function register? Explanation: Accumulator is a general function register, which can be used for multiple functions. Explanation: SP is the short form of stack pointer which store address of stack top.

What are the two main features of SFR addresses?

Consider the following two points about the SFR addresses.

• A special function register can have an address between 80H to FFH. These addresses are above 80H, as the addresses from 00 to 7FH are the addresses of RAM memory inside the 8051.
• Not all the address space of 80 to FF are used by the SFR.

What is the function of SCON register?

What is the function of the SCON register? Explanation: SCON register is mainly used for programming the start bits, stop bits and data bits of framing. As it consists of bits like RB8, TB8, SM0, SM1, SM2 etc.