What is the difference between 8051 and 8052 microcontrollers?

Answer 1

8051 and 8052 aren't interchangable, but they are similar.

The 8052 is identical to the 8051 with the following enhancements:

1. The 8052 has 256 bytes of internal RAM, the 8051 has 128.

2. The 8052 has three (3) 16-bit timers, the 8051 has two (2). The third timer has some new operation modes not available with the 8051.

Answer 2

COMPARISION BETWEEN ARM AND 8051 Microcontroller

1. ARM executes almost all the instruction in only one cycle where as 8051 micro controller takes more than one cycles in almost all the instruction except register transfer.

Ex: conditional jump takes 3 cycles for execution ex: DJNZ in 8051

conditional jump takes 1 cycles for execution ex: BNEQ in ARM

2. ARM is a RISC based architecture .

8051 is a CISC but having less number of instruction as comared to ARM which is RISC.

3. ARM is based on load store architecture i.e data processing instruction can not access memory directly , data has to be stored in a register before processing . 8051 can access memory directly .

4. ARM have conditional data processing instruction whereas 8051 does not .

Pradeep Tiwari ( M.tech.-MPSTME-NMIMS)

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Answer 3

The standard 8051 microcontroller contains 128 bytes of Internal RAM that are available to the developer as working memory for variables and/or for the operating stack. Instructions that refer to addresses in the range of 00h through 7Fh refer to the 8051's Internal RAM, while addresses in the range of 80h through FFh refer to Special Function Registers (SFRs).

Although the 8052 has 256 bytes of Internal RAM, the above method of referrencing them remains true. Any address between 00h and 7Fh refers to Internal RAM whereas address in the range of 80h through FFh refer to SFRs.

The 8052's additional Internal RAM may only be referred by Indirect Addressing. Indirect addressing always refers to Internal RAM, never to an SFR.

Thus, to read the value contained in Internal RAM address 90h, the developer would need to code something along the lines of the following: MOV R0,#90h ;Set the indirect address to 90h MOV A,@R0 ;Read the contents of Internal RAM pointed to by R0 The above code first assigns the value 90h to the register R0. It subsequently reads, indirectly, the contents of the address contained in R0 (90h). Thus, after these two instructions have executed, the Accumulator will contain the value of Internal RAM address 90h.

It is very important to understand that the above code is not the same as the following: MOV A,90h ;Reads the contents of SFR 90h (P1) This instruction uses direct addressing; recall that direct addressing reads Internal RAM when the address is in the range of 00h through 7Fh, and reads an SFR when the address is in the range of 80h through FFh. Thus in the case of this second example, the move instruction reads the value of SFR 90h-which happens to be P1 (I/O Port 1).

Answer 4

. Give difference between 8051

and 8052 microcontroller

Answer 5

1) In 8085 microprocessor clock,system control and interrupt control are integrated with in microprocessor chip.

2) 8085 microprocessor have more internal register.

Answer 6

I do not know what an 8082 is; heard of the 8085 and 8088. The 8086 is unigue in that family in the the data path is a full 16 bits wide rather than 8.

Answer 7

34 .... simple!

Answer 8

20

Answer 9

ROM

less