Sage-Tips

Can accumulator store 16 bit data?

Accumulator: The accumulator is an 8-bit register (can store 8-bit data) that is the part of the arithmetic and logical unit (ALU).

Why is accumulator 8-bit?

The accumulator is an 8-bit register that is a part of arithmetic/logic unit (ALU). This register is used to store 8-bit data and to perform arithmetic and logical operations. The result of an operation is stored in the accumulator.

Which bit if accumulator is used for serial output of data?

Bit 6: This is the serial output enables (SOE) bit. If this bit = 0, SIM instruction is not being used for serial output of data. In such a case, the MS bit of Accumulator is not having any useful information.

Which register pair of 8085 is not accepted in LDAX instruction?

It occupies only 1-Byte in the memory. This rp can be either BC register pair represented by B or DE register pair represented by D. Note that LDAX H is not provided in 8085 instruction set. This is because, LDAX H is the same as MOV A, M in its function.

What is the size of Accumulator in 8085 microprocessor?

The size of the Accumulator register in 8085 is 8 bits.

Why 8085 microprocessor is called Accumulator based microprocessor?

Register A is an 8-bit register used in 8085 to perform arithmetic, logical, I/O & LOAD/STORE operations. Register A is quite often called as an Accumulator. And the result of the arithmetic operation will be stored or accumulated in this register. …

Why accumulator are used in microprocessor?

All microprocessors make use of an accumulator register that can supply one number for an action, and where the result of an action will also be stored. The size of the accumulator in terms of bits is used as a measure of the data unit capability of the microprocessor (as 8-bit, 16-bit, 32-bit, 64-bit, and so on).

What is the size of the accumulator register a 8085 microprocessor?

Which register pair of 8085 is not accepted in Stax instruction?

This is because, STAX H is the same as MOV M, A in its functionality. Also note that there are no instructions in 8085 like STBX rp, STCX rp, etc. As Accumulator is the most important 8-bit register, whose contents can be stored in memory in more ways than any other 8-bit register.

Which one of the following addressing modes is not used in 8085 microprocessor?

Answer is “Indexed addressing”

How many bits are there in accumulator?

8 bits
Since the example accumulator is only 8 bits wide, it can handle only 1 byte at a time.

What is the use of register a in 8085 microprocessor?

Register A is an 8-bit register used in 8085 to perform arithmetic, logical, I/O & LOAD/STORE operations. Register A is quite often called as an Accumulator.

What is the use of accumulator in microprocessor?

It is one of the general purpose register of microprocessor also called as A register. The accumulator is an 8-bit register that is a part of arithmetic/logic unit (ALU). This register is used to store 8-bit data and to perform arithmetic and logical operations.

What are the functional units of 8085 in microcontroller?

8085 consists of the following functional units − It is an 8-bit register used to perform arithmetic, logical, I/O & LOAD/STORE operations. It is connected to internal data bus & ALU. As the name suggests, it performs arithmetic and logical operations like Addition, Subtraction, AND, OR, etc. on 8-bit data.

How much memory does the accumulator 8-bit instruction occupy?

In this instruction, Accumulator 8-bit content will be stored in a memory location whose 16-bit address is indicated in the instruction as a16. This instruction uses absolute addressing for specifying the destination. This instruction occupies 3-Bytes of memory.