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Intel 8XC251SB, 8XC251SA, 8XC251SP, 8XC251SQ manual WR8, WR0 WR2 WR4 WR6, DR8, DR0 DR4

Models: Embedded Microcontroller 8XC251SP 8XC251SA 8XC251SQ 8XC251SB

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ADDRESS SPACES

Register File

56 57 58 59 60 61 62 63

Locations 32-55 are Reserved

24

25

26

27

28

29

30

31

16

17

18

19

20

21

22

23

8

9

10

11

12

13

14

15

0

1

2

3

4

5

6

7

0

1

2

3

4

5

6

7

Banks 0-3

Byte Registers

Note: R10 = B

R11 = ACC

R8 R9 R10 R11 R12 R13 R14 R15

R0 R1 R2 R3 R4 R5 R6 R7

Word Registers

 

 

 

 

WR24

WR26

WR28

WR30

WR16

WR18

WR20

WR22

WR8

WR10

WR12

WR14

WR0

WR2

WR4

WR6

 

Dword Registers

 

 

 

 

 

DR56 = DPX

DR60 = SPX

 

 

 

 

DR24

DR28

DR16

DR20

DR8

DR12

DR0

DR4

A4099-01

Figure 3-6. The Register File

3-11

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Intel 8XC251SB, 8XC251SA, 8XC251SP, 8XC251SQ, Embedded Microcontroller manual WR8, WR0 WR2 WR4 WR6, DR8, DR0 DR4
Page 52 Page 54

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.