要搞清楚單片機(jī)與PLC的異同，首先得明確什幺是單片機(jī)，什幺是PLC。對此，我們簡要回顧一下計(jì)算機(jī)的發(fā)展歷程也許有幫助，按計(jì)算機(jī)專家的原始定義，計(jì)算機(jī)系統(tǒng)由五大部分--即控制單元（CU）、算術(shù)運(yùn)算單元（ALU）、存儲(chǔ)器（Memory）、輸入設(shè)備（Input）、輸出設(shè)備（Output）組成。早期計(jì)算機(jī)（晶體管的或集成電路的，不包括電子管的）的CU或ALU由一塊甚至多塊電路板組成，CU和ALU是分離的，隨著集成度的提高，CU和ALU合在一塊就組成了中央處理單元（CPU）,接著將CPU集成到單塊集成電路中就產(chǎn)生MPU或MCU,出現(xiàn)了如Intel4004、8008、8080，8085、8086、8088、Z80等MPU。此后，MPU的發(fā)展產(chǎn)生了兩條分支，一支往高性能、高速度、大容量方向發(fā)展，典型芯片如：Intel80186、286、386、486、586、P2、P3、P4等，速度從4.7MHz到現(xiàn)在的3.2GHz。另一支則往多功能方向發(fā)展，將存儲(chǔ)器(ROM、PROM、EPROM、EEPROM、FLASHROM、SRAM等)、輸入/出接口（Timer/Counter、PWM、ADC/DAC、UART、IIC、SPI、RTC、PCA、FPGA等）全部集成在一塊集成電路中而成為SOC。依愚之見，這就是當(dāng)今廣泛應(yīng)用的單片計(jì)算機(jī)，簡稱單片機(jī)。這一分支可謂品種繁多，位寬從8位到32位，引腳數(shù)從6個(gè)到幾百個(gè)，工作頻率從幾十KHz到幾百M(fèi)Hz,體系結(jié)構(gòu)既有CISC也有RISC,數(shù)不勝數(shù)。常用的有MCS-51系列、MCS-96系列、PIC系列、AVR系列、ARM7/9系列、TMS320系列、MSP430系列、MOTOROLA眾多的單片機(jī)等等。
上傳時(shí)間： 2013-10-16
上傳用戶：jjj0202
The MSP-FET430PIF is a Parallel Port interface (does not include target board) that is used to program and debug MSP430 FET tools and test boards through the JTAG interface. This interface is included in our FET tools, but sold without the development board. This interface uses a Parallel PC Port to communicate to the Debugger Software (IAR Kickstart software included) running on the PC. The interface uses the standard 14 pin header to communicate to the MSP430 device using the standard JTAG protocol. The flash memory can be erased and programmed in seconds with only a few keystrokes, and since the MSP430 flash is extremely low power, no external power supply is required. The tool has an integrated software environment and connects directly to the PC which greatly simplifies the set-up and use of the tool. The flash development tool supports development with all MSP430 flash parts. Features MSP430 debugging interface to connect a MSP430-Flash-device to a Parallel port on a PC Supports JTAG debug protocol (NO support for Spy-Bi-Wire (2-wire JTAG) debug protocol, Spy-Bi-Wire (2-wire JTAG) is supported by MSP-FET430UIF) Parallel Port cable and a 14-conductor target cable Full documentation on CD ROM Integrated IAR Kickstart user interface which includes: Assembler Linker Limulator Source-level debugger Limited C-compiler Technical specifications: Backwardly compatable with existing FET tool boards.
上傳時(shí)間： 2013-10-26
上傳用戶：fengweihao158@163.com
The MSP-FET430U14 is a powerful flash emulation tool to quickly begin application development on the MSP430 MCU. It includes USB debugging interface used to program and debug the MSP430 in-system through the JTAG interface or the pin saving Spy Bi-Wire (2-wire JTAG) protocol. The flash memory can be erased and programmed in seconds with only a few keystrokes, and since the MSP430 flash is ultra-low power, no external power supply is required. The debugging tool interfaces the MSP430 to the included integrated software environment and includes code to start your design immediately. The MSP-FET430UIF development tools supports development with all MSP430 flash devices
上傳時(shí)間： 2013-10-28
上傳用戶：13691535575
NXP Semiconductor designed the LPC2400 microcontrollers around a 16-bit/32-bitARM7TDMI-S CPU core with real-time debug interfaces that include both JTAG andembedded Trace. The LPC2400 microcontrollers have 512 kB of on-chip high-speedFlash memory. This Flash memory includes a special 128-bit wide memory interface andaccelerator architecture that enables the CPU to execute sequential instructions fromFlash memory at the maximum 72 MHz system clock rate. This feature is available onlyon the LPC2000 ARM Microcontroller family of products. The LPC2400 can execute both32-bit ARM and 16-bit Thumb instructions. Support for the two Instruction Sets meansEngineers can choose to optimize their application for either performance or code size atthe sub-routine level. When the core executes instructions in Thumb state it can reducecode size by more than 30 % with only a small loss in performance while executinginstructions in ARM state maximizes core performance.
上傳時(shí)間： 2013-11-15
上傳用戶：zouxinwang
MPLAB C30用戶指南(英文) HIGHLIGHTSThe information covered in this chapter is as follows:• About this Guide• Recommended Reading• Troubleshooting• The Microchip Web Site• Development Systems Customer Notification Service• Customer Support Document LayoutThe document layout is as follows:• Chapter 1: Compiler Overview – describes MPLAB C30, development tools andfeature set.• Chapter 2: Differences between MPLAB C30 and ANSI C – describes thedifferences between the C language supported by MPLAB C30 syntax and thestandard ANSI-89 C.• Chapter 3: Using MPLAB C30 – describes how to use the MPLAB C30 compilerfrom the command line.• Chapter 4: MPLAB C30 Runtime Environment – describes the MPLAB C30runtime model, including information on sections, initialization, memory models, thesoftware stack and much more.• Chapter 5: Data Types – describes MPLAB C30 integer, floating point and pointerdata types.• Chapter 6: Device Support Files – describes the MPLAB C30 header and registerdefinition files, as well as how to use with SFR’s.• Chapter 7: Interrupts – describes how to use interrupts.• Chapter 8: Mixing Assembly Language and C Modules – provides guidelines tousing MPLAB C30 with MPLAB ASM30 assembly language modules.
上傳時(shí)間： 2013-10-21
上傳用戶：13925096126
PICKIT™ 2 PROGRAMMER-TO-GO USER GUIDE The PICkit 2 Programmer-To-Go functionality allows a PIC MCU memory image to be downloaded into the PICkit 2 unit for later programming into a specific PIC MCU. No software or PC is required to program devices once the PICkit 2 unit is set up for Programming-To-Go. A USB power source for the PICkit 2 is all that is needed.
標(biāo)簽： PROGRAMMER-TO PICKIT 8482
上傳時(shí)間： 2013-10-29
上傳用戶：ca05991270
STC12C5410AD 系列單片機(jī)器件手冊 STC12C5412, STC12C5412ADSTC12C5410, STC12C5410ADSTC12C5408, STC12C5408ADSTC12C5406, STC12C5406ADSTC12C5404, STC12C5404ADSTC12C5402, STC12C5402ADSTC12C5410AD 系列單片機(jī)器件手冊技術(shù)支援： 宏晶科技（ 深圳）www.MCU-Memory.com support@MCU-Memory.comUpdate date: 2006-4-15 (請隨時(shí)注意更新)--- 高速，高可靠--- 低功耗,超低價(jià)--- 無法解密--- 強(qiáng)抗靜電，強(qiáng)抗干擾STC12LE5412, STC12LE5412ADSTC12LE5410, STC12LE5410ADSTC12LE5408, STC12LE5408ADSTC12LE5406, STC12LE5406ADSTC12LE5404, STC12LE5404ADSTC12LE5402, STC12LE5402AD
上傳時(shí)間： 2014-12-27
上傳用戶：han_zh
HT48E MCU系列1K位EEPROM 本文以HT48E06 為例子，但程序可適用于HOLTEK HT48E06、HT48E10、HT48E30 等，含有1K 位EEPROM Data Memory 的MCU。
上傳時(shí)間： 2014-12-27
上傳用戶：lalaruby
C51使用手冊 .pdf 第二節(jié)內(nèi)存區(qū)域(Memory Areas)1. Pragram Area由Code 說明可有多達(dá)64kBytes 的程序存儲(chǔ)器2. Internal Data Memory:內(nèi)部數(shù)據(jù)存儲(chǔ)器可用以下關(guān)鍵字說明data 直接尋址區(qū)為內(nèi)部RAM 的低128 字節(jié)00H 7FHidata 間接尋址區(qū) 包括整個(gè)內(nèi)部RAM 區(qū)00H FFHbdata 可位尋址區(qū) 20H 2FH3. External Data Memory外部RAM 視使用情況可由以下關(guān)鍵字標(biāo)識(shí)xdata 可指定多達(dá)64KB 的外部直接尋址區(qū)地址范圍0000H 0FFFFHpdata 能訪問1 頁(25bBytes)的外部RAM 主要用于緊湊模式(Compact Model)4. Speciac Function Register Memory
上傳時(shí)間： 2013-11-19
上傳用戶：busterman
1.1 微型計(jì)算機(jī)的組成及工作原理1.1.1 微型計(jì)算機(jī)中的基本概念1. 微處理器2. 微型計(jì)算機(jī) (1)單片微處理機(jī) (2)通用微型計(jì)算機(jī)3. 微型計(jì)算機(jī)系統(tǒng)1.1.2 微機(jī)基本結(jié)構(gòu) 微型計(jì)算機(jī)的基本組成如圖1.1所示，它由中央處理器（CPU）、存儲(chǔ)器（Memory）、輸入輸出接口（I/O接口）和系統(tǒng)總線（BUS）構(gòu)成。 1.1.3 微型計(jì)算機(jī)的基本工作過程 微型計(jì)算機(jī)的基本工作過程是執(zhí)行程序的過程，也就是CPU自動(dòng)從程序存放的第1個(gè)存儲(chǔ)單元起，逐步取出指令、分析指令，并根據(jù)指令規(guī)定的操作類型和操作對象，執(zhí)行指令規(guī)定的相關(guān)操作。如此重復(fù)，周而復(fù)始，直至執(zhí)行完程序的所有指令，從而實(shí)現(xiàn)程序的基本功能，這就是微型計(jì)算機(jī)的基本工作原理。 1.2 典型單片機(jī)產(chǎn)品簡介1.2.1 MCS-51單片機(jī)系列 MCS-51可分為兩個(gè)子系列和4種類型，如表1-1所示。按資源的配置數(shù)量，MCS-51系列分為51和52兩個(gè)子系列，其中51子系列是基本型，而52子系列屬于增強(qiáng)型。表1-1 MCS-51系列單片機(jī)分類
標(biāo)簽： 微型計(jì)算機(jī) 基礎(chǔ)知識(shí)
上傳時(shí)間： 2013-11-07
上傳用戶：debuchangshi
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