Intel 8XC251SP, 8XC251SA, 8XC251SQ, 8XC251SB, Embedded Microcontroller manual Eprom

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

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GLOSSARY

deassert

The term deassert refers to the act of making a signal

 

inactive (disabled). The polarity (high/low) is defined

 

by the signal name. Active-low signals are designated

 

by a pound symbol (#) suffix; active-high signals have

 

no suffix. To deassert RD# is to drive it high; to

 

deassert ALE is to drive it low.

doping

The process of introducing a periodic table Group III

 

or Group V element into a Group IV element (e.g.,

 

silicon). A Group III impurity (e.g., indium or

 

gallium) results in a p-typematerial. A Group V

 

impurity (e.g., arsenic or antimony) results in an n-

 

type material.

double word

A 32-bit unit of data. In memory, a double word

 

comprises four contiguous bytes.

dword

See double word.

edge-triggered

The mode in which a device or component recognizes

 

a falling edge (high-to-low transition), a rising edge

 

(low-to-high transition), or a rising or falling edge of

 

an input signal as the assertion of that signal. See also

 

level-triggered.

encryption array

An array of key bytes used to encrypt user code in the

 

on-chip code memory as that code is read; protects

 

against unauthorized access to user’s code.

EPROM

Erasable, programmable read-only memory

external address

A 16-bit or 17-bit address presented on the device

 

pins. The address decoded by an external device

 

depends on how many of these address bits the

 

external system uses. See also internal address.

FET

Field-effect transistor.

idle mode

The power conservation mode that freezes the core

 

clocks but leaves the peripheral clocks running.

input leakage

Current leakage from an input pin to power or ground.

integer

Any member of the set consisting of the positive and

 

negative whole numbers and zero.

internal address

The 24-bit address that the device generates. See also

 

external address.

Glossary-3

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Intel 8XC251SP, 8XC251SA, 8XC251SQ, 8XC251SB, Embedded Microcontroller manual Eprom

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.