How many registers are there in microcontroller?

A RAM register on an 8 bit microcontroller can hold a total of 8 bits, or one byte of data. A typical RAM space specification may specify that it is 256 x 8. This means that there are a total of 256 registers in the RAM, and those registers can hold 8 bits each.

How many special function registers are there in 8051 microcontroller?

21
There are 21 SFR’s (special function registers) in microcontroller 8051. The SFR is the upper area of addressable memory, from address OX80 to OXff. These SFR’s contain all peripherally related register like P0, P1, P2, P3, timers or counters, serial part and interrupt related registers.

How many SFR are there?

There are 21 Special function registers (SFR) in 8051 micro controller and this includes Register A, Register B, Processor Status Word (PSW), PCON etc etc. There are 21 unique locations for these 21 special function registers and each of these register is of 1 byte size.

What are special function registers?

8051 Registers The part of memory which is used for general purpose is called as RAM, and the memory used for Special Function Register (SFR) contains all the peripheral related registers like Accumulator, ‘B’ register, Timers or Counters, and interrupt related registers.

What are the registers in microcontroller?

Different Types of Registers in the 8051 Microcontroller

• 8051 RAM Memory.
• General Purpose Memory.
• PSW Registers.
• Carry Flag.
• Auxiliary Carry (AC)
• Overflow Flag.
• Special Function Registers (SFR)
• Accumulator register.

How many number of register are there in the timer?

Both Timer 1 and Timer 0 in Mode 0 operate as 8-bit counters (with a divide-by-32 prescaler). Timer register is configured as a 13-bit register consisting of all the 8 bits of TH1 and the lower 5 bits of TL1. The upper 3 bits of TL1 are indeterminate and should be ignored.

Which of the following is a 8-bit special function register?

Which of the following is an 8-bit register? Explanation: The registers, PSW, TCON and Accumulator are 8-bit registers.

How many registers are there in 8051?

The 8051 contains two 16-bit registers: the program counter (PC) and the data pointer (DPTR).

How many GPR are there in 8051?

The 8051 has 4 registers bank . The B0, B1, B2, and B3 stand for banks and each bank contains eight general purpose registers ranging from ‘R0’ to ‘R7’.

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.