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單片機與PLC的區別

要搞清楚單片機與PLC的異同，首先得明確什幺是單片機，什幺是PLC。對此，我們簡要回顧一下計算機的發展歷程也許有幫助，按計算機專家的原始定義，計算機系統由五大部分--即控制單元（CU）、算術運算單元（ALU）、存儲器（Memory）、輸入設備（Input）、輸出設備（Output）組成。早期計算機（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生MPU或MCU,出現了如Intel4004、8008、8080，8085、8086、8088、Z80等MPU。此后，MPU的發展產生了兩條分支，一支往高性能、高速度、大容量方向發展，典型芯片如：Intel80186、286、386、486、586、P2、P3、P4等，速度從4.7MHz到現在的3.2GHz。另一支則往多功能方向發展，將存儲器(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，這就是當今廣泛應用的單片計算機，簡稱單片機。這一分支可謂品種繁多，位寬從8位到32位，引腳數從6個到幾百個，工作頻率從幾十KHz到幾百MHz,體系結構既有CISC也有RISC,數不勝數。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眾多的單片機等等。

標簽： PLC 單片機

上傳時間： 2013-10-16

上傳用戶：jjj0202
FET430PIF自制資料

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.

標簽： FET 430 PIF

上傳時間： 2013-10-26

上傳用戶：fengweihao158@163.com
MSP430 USB JTAG自制資料

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

標簽： JTAG MSP 430 USB

上傳時間： 2013-10-28

上傳用戶：13691535575
keil c51 v9.01 (C51單片機開發工具Kei

keil c51 v9.01此版不是漢化中文版，是英文版來的。ARM發布Keil μVision4集成開發環境(IDE)，用來在微控制器和智能卡設備上創建、仿真和調試嵌入式應用。 μVision4 IDE是為增強開發人員的工作效率設計的，有了它可以更快速、更高效地開發和檢驗程序。通過μVision4 IDE中引入的靈活的窗口管理系統，開發人員可以使用多臺監視器，在可視界面任何地方全面控制窗口放置。新用戶界面可以更好地利用屏幕空間，更有效地組織多個窗口，為開發應用提供整齊高效的環境。 μVision4在μVision3的成功經驗的基礎上增加了：* System Viewer (系統查看程序)窗口，提供了設備外圍寄存器信息，這些信息可以在System Viewer窗口內部直接更改。* Debug Restore Views (調試恢復視圖)允許保存多個窗口布局，為程序分析迅速選擇最適合的調試視圖。* Multi-Project Workspace(多項目工作空間)為處理多個并存的項目提供了簡化的方法，如引導加載程序和應用程序。* 為基于ARM Cortex 處理器的MCU提供了Data and instruction trace(數據和指令追蹤)功能。* 擴展了Device Simulation(設備仿真)功能以支持許多新設備，如Luminary、NXP和東芝生產的基于ARM Cortex-M3處理器的MCU；Atmel SAM7/9；及新的8051衍生品，如Infineon XC88x和SiLABS 8051Fxx。* 支持許多debug adapter interfaces(調試適配器接口)，包括ADI miDAS Link、Atmel SAM-ICE、Infineon DAS和ST-Link。

標簽： keil 9.01 c51 C51

上傳時間： 2013-10-31

上傳用戶：qingdou
lpc2478完全使用手冊

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.

標簽： 2478 lpc 使用手冊

上傳時間： 2013-11-15

上傳用戶：zouxinwang
MPLAB C30用戶指南(英文)

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.

標簽： MPLAB C30 用戶英文

上傳時間： 2013-10-21

上傳用戶：13925096126
PICKIT™ 2 PROGRAMMER-TO-

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.

標簽： PROGRAMMER-TO PICKIT 8482

上傳時間： 2013-10-29

上傳用戶：ca05991270
STC12C5410AD 系列單片機器件手冊

STC12C5410AD 系列單片機器件手冊 STC12C5412, STC12C5412ADSTC12C5410, STC12C5410ADSTC12C5408, STC12C5408ADSTC12C5406, STC12C5406ADSTC12C5404, STC12C5404ADSTC12C5402, STC12C5402ADSTC12C5410AD 系列單片機器件手冊技術支援：宏晶科技（深圳）www.MCU-Memory.com support@MCU-Memory.comUpdate date: 2006-4-15 (請隨時注意更新)--- 高速，高可靠--- 低功耗,超低價--- 無法解密--- 強抗靜電，強抗干擾STC12LE5412, STC12LE5412ADSTC12LE5410, STC12LE5410ADSTC12LE5408, STC12LE5408ADSTC12LE5406, STC12LE5406ADSTC12LE5404, STC12LE5404ADSTC12LE5402, STC12LE5402AD

標簽： C5410 5410 STC 12C

上傳時間： 2014-12-27

上傳用戶：han_zh
HT48E MCU系列1K位EEPROM

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。

標簽： EEPROM 48E MCU HT

上傳時間： 2014-12-27

上傳用戶：lalaruby
C51使用手冊

C51使用手冊 .pdf 第二節內存區域(Memory Areas)1. Pragram Area由Code 說明可有多達64kBytes 的程序存儲器2. Internal Data Memory:內部數據存儲器可用以下關鍵字說明data 直接尋址區為內部RAM 的低128 字節00H 7FHidata 間接尋址區包括整個內部RAM 區00H FFHbdata 可位尋址區 20H 2FH3. External Data Memory外部RAM 視使用情況可由以下關鍵字標識xdata 可指定多達64KB 的外部直接尋址區地址范圍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

標簽： C51 使用手冊

上傳時間： 2013-11-19

上傳用戶：busterman