8XC251SA, SB, SP, SQ USER’S MANUAL

A.2 OPCODE MAP AND SUPPORTING TABLES

Table A-6. Instructions for MCS® 51 Microcontrollers

Bin.

0

1

2

3

4

5

6-7

8-F

 

 

 

 

 

 

 

 

 

Src.

0

1

2

3

4

5

A5x6–A5 x7

A5x8–A5 xF

 

 

 

 

 

 

 

 

 

0

NOP

AJMP

LJMP

RR

INC

INC

INC

INC

 

 

addr11

addr16

A

A

dir8

@Ri

Rn

 

 

 

 

 

 

 

 

 

1

JBC

ACALL

LCALL

RRC

DEC

DEC

DEC

DEC

 

bit,rel

addr11

addr16

A

A

dir8

@Ri

Rn

 

 

 

 

 

 

 

 

 

2

JB

AJMP

RET

RLA

ADD

ADD

ADD

ADD

 

bit,rel

addr11

 

 

A,#data

A,dir8

A,@Ri

A,Rn

 

 

 

 

 

 

 

 

 

3

JNB

ACALL

RETI

RLCA

ADDC

ADDC

ADDC

ADDC

 

bit,rel

addr11

 

 

A,#data

A,dir8

A,@Ri

A,Rn

 

 

 

 

 

 

 

 

 

4

JC

AJMP

ORL

ORL

ORL

ORL

ORL

ORL

 

rel

addr11

dir8,A

dir8,#data

A,#data

A,dir8

A,@Ri

A,Rn

 

 

 

 

 

 

 

 

 

5

JNC

ACALL

ANL

ANL

ANL

ANL

ANL

ANL

 

rel

addr11

dir8,A

dir8,#data

A,#data

A,dir8

A,@Ri

A,Rn

 

 

 

 

 

 

 

 

 

6

JZ

AJMP

XRL

XRL

XRL

XRL

XRL

XRL

 

rel

addr11

dir8,A

dir8,#data

A,#data

A,dir8

A,@Ri

A,Rn

 

 

 

 

 

 

 

 

 

7

JNZ

ACALL

ORL

JMP

MOV

MOV

MOV

MOV

 

rel

addr11

CY,bit

@A+DPTR

A,#data

dir8,#data

@Ri,#data

Rn,#data

 

 

 

 

 

 

 

 

 

8

SJMP

AJMP

ANL

MOVC

DIV

MOV

MOV

MOV

 

rel

addr11

CY,bit

A,@A+PC

AB

dir8,dir8

dir8,@Ri

dir8,Rn

 

 

 

 

 

 

 

 

 

9

MOV

ACALL

MOV

MOVC

SUBB

SUBB

SUBB

SUBB

 

DPTR,#data16

addr11

bit,CY

A,@A+DPTR

A,#data

A,dir8

A,@Ri

A,Rn

 

 

 

 

 

 

 

 

 

A

ORL

AJMP

MOV

INC

MUL

ESC

MOV

MOV

 

CY,bit

addr11

CY,bit

DPTR

AB

 

@Ri,dir8

Rn,dir8

 

 

 

 

 

 

 

 

 

B

ANL

ACALL

CPL

CPL

CJNE

CJNE

CJNE

CJNE

 

CY,bit

addr11

bit

CY

A,#data,rel

A,dir8,rel

@Ri,#data,rel

Rn,#data,rel

 

 

 

 

 

 

 

 

 

C

PUSH

AJMP

CLR

CLR

SWAP

XCH

XCH

XCH

 

dir8

addr11

bit

CY

A

A,dir8

A,@Ri

A,Rn

 

 

 

 

 

 

 

 

 

D

POP

ACALL

SETB

SETB

DA

DJNZ

XCHD

DJNZ

 

dir8

addr11

bit

CY

A

dir8,rel

A,@Ri

Rn,rel

 

 

 

 

 

 

 

 

 

E

MOVX

AJMP

 

MOVX

CLR

MOV

MOV

MOV

 

A,@DPTR

addr11

 

A,@Ri

A

A,dir8

A,@Ri

A,Rn

 

 

 

 

 

 

 

 

 

F

MOV

ACALL

 

MOVX

CPL

MOV

MOV

MOV

 

@DPTR,A

addr11

 

@Ri,A

A

dir8,A

@Ri,A

Rn,A

 

 

 

 

 

 

 

 

 

A-4

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Intel 8XC251SP, 8XC251SA, 8XC251SQ Opcode MAP and Supporting Tables, Table A-6. Instructions for MCS 51 Microcontrollers

Embedded Microcontroller, 8XC251SP, 8XC251SA, 8XC251SQ, 8XC251SB specifications

The Intel 8XC251 series of embedded microcontrollers is a family of versatile and powerful devices, designed to meet the demands of a wide range of applications. With models such as the 8XC251SB, 8XC251SQ, 8XC251SA, and 8XC251SP, this series offers unique features while maintaining a high level of performance and reliability.

At the heart of the 8XC251 microcontrollers is the 8051 architecture, which provides a 16-bit processor capable of executing complex instructions efficiently. This architecture not only allows for a rich instruction set but also facilitates programming in assembly language and higher-level languages like C, which are essential for developing sophisticated embedded systems.

One of the significant features of the 8XC251 family is its integrated peripherals, including timer/counters, serial communication interfaces, and interrupt systems. These peripherals enable developers to implement timing functions, data communication, and real-time processing, all of which are crucial in modern embedded applications. The 8XC251SB and 8XC251SQ models, for instance, come equipped with multiple I/O ports that allow for interfacing with other devices and systems, enhancing their functionality in various environments.

The memory architecture of the 8XC251 devices is noteworthy, featuring on-chip ROM, RAM, and EEPROM. The on-chip memory allows for fast access times, which is essential for executing programs efficiently. Moreover, the EEPROM serves as non-volatile memory, enabling the storage of configuration settings and important data that must be retained even when power is lost.

In terms of operating voltage, the 8XC251 devices are designed to operate in a wide range, typically between 4.0V and 6.0V. This flexibility makes them suitable for battery-powered applications, where energy efficiency is critical. The power management features, including reduced power modes, further enhance their suitability for portable devices.

Lastly, the 8XC251 series is supported by a wide range of development tools and resources, allowing engineers and developers to streamline the development process. This support, combined with the microcontrollers' robust features, makes the Intel 8XC251 family a reliable choice for various embedded applications, such as industrial automation, automotive systems, and consumer electronics.

Overall, the Intel 8XC251SB, 8XC251SQ, 8XC251SA, and 8XC251SP deliver high performance, versatility, and ease of use, making them a preferred choice for embedded system designers looking to develop efficient and effective solutions.