The Intel 8XC52/8XC54/8XC58 is a single-chip control-oriented microcontroller which is fabricated on Intel’s reliable CHMOS III-E technology. Being a member of the MCS 51 family of controllers, the 8XC52/8XC54/ 8XC58 uses the same powerful instruction set, has the same architecture, and is pin-for-pin compatible with the existing MCS 51 family of products. The 8XC52/8XC54/8XC58 is an enhanced version of the 87C51/80C51BH/80C31BH. The added features make it an even more powerful microcontroller for applica tions that require clock output, and up/down counting capabilities such as motor control. It also has a more versatile serial channel that facilitates multi-processor communications.

Throughout this document 8XC5X will refer to the 8XC52, 80C32, 8XC54 and 8XC58 unless information applies to a specific device.

■ High Performance CHMOS EPROM/ROM/CPU

■ 12/24/33 MHz Operations

■ Three 16-Bit Timer/Counters

■ Programmable Clock Out

■ Up/Down Timer/Counter

■ Three Level Program Lock System

■ 8K/16K/32K On-Chip Program Memory

■ 256 Bytes of On-Chip Data RAM

■ Improved Quick Pulse Programming Algorithm

■ Boolean Processor

■ 32 Programmable I/O Lines

■ 6 Interrupt Sources

■ Programmable Serial Channel with:

— Framing Error Detection

— Automatic Address Recognition

■ TTL and CMOS Compatible Logic Levels

■ 64K External Program Memory Space

■ 64K External Data Memory Space

■ MCSé 51 Microcontroller Compatible Instruction Set

■ Power Saving Idle and Power Down Modes

■ ONCE (On-Circuit Emulation) Mode

■ Four-Level Interrupt Priority

■ Extended Temperature Range Except

for 33 MHz Offering (-40°C to +85°C)

S87C54屬于集成電路（IC） > 微控制器。英特爾（美國科技公司）制造生產(chǎn)的S87C54微控制器微控制器產(chǎn)品是相對復雜的用戶可編程數(shù)字邏輯器件。這些產(chǎn)品與視為微控制器的器件密切相關，兩者之間的區(qū)別主要體現(xiàn)在制造商選擇的用詞。不過按照傳統(tǒng)，微控制器集成了工作存儲器，也更可能包含混合信號外設，并且往往與更簡單的軟件范例結合使用，旨在重復執(zhí)行一系列預定義的任務。