18-2. D/A轉(zhuǎn)換器基本知識(shí)18-3. 光導(dǎo)智能小車硬件實(shí)現(xiàn)18-4. ADC0832基本應(yīng)用方法18-5. 光導(dǎo)智能小車軟件實(shí)現(xiàn)A/D轉(zhuǎn)換器的主要技術(shù)指標(biāo)分辨率 使輸出數(shù)字量變化一個(gè)相鄰數(shù)碼所需輸入模擬電壓的變化量。常 用二進(jìn)制的位數(shù)表示。 例如:12位ADC的分辨率就是12位，一個(gè)10V滿刻度的12位ADC能分辨 輸入電壓變化最小是: 10V×1/212=2.4mV量化誤差 ADC把模擬量變?yōu)閿?shù)字量，用數(shù)字量近似表示模擬量，這個(gè)過程稱為量化。量化誤差是ADC的有限位數(shù)對模擬量進(jìn)行量化而引起的誤差。A/D轉(zhuǎn)換器的主要技術(shù)指標(biāo)偏移誤差 指輸入信號(hào)為零時(shí)，輸出信號(hào)不為零的值，所以有時(shí)又稱為零值誤差。滿刻度誤差 滿刻度誤差又稱為增益誤差。指滿刻度輸出數(shù)碼所對應(yīng)的實(shí)際輸入電壓與理想輸入電壓之差。線性度 線性度有時(shí)又稱為非線性度，指轉(zhuǎn)換器實(shí)際的轉(zhuǎn)換特性與理想直線的最大偏差。A/D轉(zhuǎn)換器的主要技術(shù)指標(biāo)絕對精度 在一個(gè)轉(zhuǎn)換器中，任何數(shù)碼所對應(yīng)的實(shí)際模擬量輸入與理論模擬輸入之差的最大值，稱為絕對精度。對于ADC而言，可以在每一個(gè)階梯的水平中點(diǎn)進(jìn)行測量，它包括了所有的誤差。轉(zhuǎn)換速率 指ADC能夠重復(fù)進(jìn)行數(shù)據(jù)轉(zhuǎn)換的速度，即每秒轉(zhuǎn)換的次數(shù)。而完成一次A/D轉(zhuǎn)換所需的時(shí)間（包括穩(wěn)定時(shí)間），則是轉(zhuǎn)換速率的倒數(shù)。
標(biāo)簽： 單片機(jī) 應(yīng)用接口
上傳時(shí)間： 2013-11-25
上傳用戶：banlangen
Σ-ΔA/D技術(shù)具有高分辨率、高線性度和低成本的特點(diǎn)。本文基于TI公司的MSP430F1121單片機(jī)，介紹了采用內(nèi)置比較器和外圍電路構(gòu)成類似于Σ-△的高精度A/D實(shí)現(xiàn)方案，適合用于對溫度、壓力和電壓等緩慢變化信號(hào)的采集應(yīng)用。 在各種A/D轉(zhuǎn)換器中，最常用是逐次逼近法(SAR)A/D，該類器件具有轉(zhuǎn)換時(shí)間固定且快速的特點(diǎn)，但難以顯著提高分辨率；積分型A/D 有較強(qiáng)的抗干擾能力，但轉(zhuǎn)換時(shí)間較長；過采樣Σ-ΔA/D由于其高分辨率，高線性度及低成本的特點(diǎn)，正得到越來越多的應(yīng)用。根據(jù)這些特點(diǎn)，本文以TI公司的MSP430F1121單片機(jī)實(shí)現(xiàn)了一種類似于Σ-ΔA/D技術(shù)的高精度轉(zhuǎn)換器方案。 MSP430F1121是16位RISC結(jié)構(gòu)的FLASH型單片機(jī)，該芯片有14個(gè)雙向I/O口并兼有中斷功能，一個(gè)16位定時(shí)器兼有計(jì)數(shù)和定時(shí)功能。I/O口輸出高電平時(shí)電壓接近Vcc，低電平時(shí)接近Vss，因此，一個(gè)I/O口可以看作一位DAC，具有PWM功能。 該芯片具有一個(gè)內(nèi)置模擬電壓比較器，只須外接一只電阻和電容即可構(gòu)成一個(gè)類似于Σ-Δ技術(shù)的高精度單斜率A/D。一般而言，比較器在使用過程中會(huì)受到兩種因素的影響，一種是比較器輸入端的偏置電壓的積累；另一種是兩個(gè)輸入端電壓接近到一程度時(shí)，輸出端會(huì)產(chǎn)生振蕩。 MSP430F1121單片機(jī)在比較器兩輸入端對應(yīng)的單片機(jī)端口與片外輸入信號(hào)的連接線路保持不變的情況下，可通過軟件將比較器兩輸入端與對應(yīng)的單片機(jī)端口的連接線路交換，并同時(shí)將比較器的輸出極性變換，這樣抵消了比較器的輸入端累積的偏置電壓。通過在內(nèi)部將輸出連接到低通濾波器后，即使在比較器輸入端兩比較電壓非常接近，經(jīng)過濾波后也不會(huì)出現(xiàn)輸出端的振蕩現(xiàn)象，從而消除了輸出端震蕩的問題。利用內(nèi)置比較器實(shí)現(xiàn)高精度A/D圖1是一個(gè)可直接使用的A/D轉(zhuǎn)換方案，該方案是一個(gè)高精度的積分型A/D轉(zhuǎn)換器。其基本原理是用單一的I/O端口，執(zhí)行1位的數(shù)模轉(zhuǎn)換，以比較器的輸出作反饋，來維持Vout與Vin相等。圖1：利用MSP430F1121實(shí)現(xiàn)的實(shí)用A/D轉(zhuǎn)換器電路方案。
標(biāo)簽： 用單片機(jī) 內(nèi)置 比較器 變換器
上傳時(shí)間： 2013-11-10
上傳用戶：lliuhhui
PIC系列單片機(jī)手冊 第1 章 簡介 1-1簡介 ................................................................................................................................................................. 1-2本手冊的宗旨 ................................................................................................................................................... 1-3器件結(jié)構(gòu) .......................................................................................................................................................... 1-4開發(fā)支持 .......................................................................................................................................................... 1-6器件種類 .......................................................................................................................................................... 1-7格式和符號(hào)的約定 ......................................................................................................................................... 1-12相關(guān)文檔 ........................................................................................................................................................ 1-14相關(guān)應(yīng)用筆記 ................................................................................................................................................. 1-17版本歷史 ........................................................................................................................................................ 1-18第2 章 振蕩器 2-1簡介 ................................................................................................................................................................. 2-2振蕩器配置 ...................................................................................................................................................... 2-2晶體振蕩器 / 陶瓷諧振器 ................................................................................................................................. 2-4外部RC 振蕩器 ............................................................................................................................................. 2-124MHz 內(nèi)部 RC 振蕩器 ................................................................................................................................... 2-13休眠模式對片內(nèi)振蕩器的影響 ........................................................................................................................ 2-17器件復(fù)位對片內(nèi)振蕩器的影響 ........................................................................................................................ 2-17設(shè)計(jì)技巧 ........................................................................................................................................................ 2-18相關(guān)應(yīng)用筆記 ................................................................................................................................................. 2-19版本歷史 ........................................................................................................................................................ 2-20第3 章 復(fù)位 3-1簡介 ................................................................................................................................................................. 3-2上電復(fù)位、上電延時(shí)定時(shí)器、 起振定時(shí)器、欠壓復(fù)位和奇偶校驗(yàn)錯(cuò)誤復(fù)位 ...................................................... 3-4寄存器和狀態(tài)位的值 ...................................................................................................................................... 3-10設(shè)計(jì)技巧 ........................................................................................................................................................ 3-16相關(guān)應(yīng)用筆記 ................................................................................................................................................. 3-17版本歷史 ........................................................................................................................................................ 3-18 第4 章 架構(gòu) 4-1簡介 ................................................................................................................................................................. 4-2時(shí)序圖/ 指令周期 ............................................................................................................................................ 4-5指令流/ 流水線 ................................................................................................................................................ 4-6I/O 端口描述 .................................................................................................................................................... 4-7設(shè)計(jì)技巧 ........................................................................................................................................................ 4-12相關(guān)應(yīng)用筆記 ................................................................................................................................................. 4-13版本歷史 ........................................................................................................................................................ 4-14 第5 章 CPU 和ALU 5-1簡介 ................................................................................................................................................................. 5-2指令的一般格式 ............................................................................................................................................... 5-4中央處理單元（CPU） .................................................................................................................................... 5-4指令時(shí)鐘 .......................................................................................................................................................... 5-4算術(shù)邏輯單元（ALU） .................................................................................................................................... 5-5狀態(tài)寄存器 ...................................................................................................................................................... 5-6OPTION_REG 寄存器 ..................................................................................................................................... 5-8電源控制寄存器 ............................................................................................................................................... 5-9設(shè)計(jì)技巧 ........................................................................................................................................................ 5-10相關(guān)應(yīng)用筆記 ................................................................................................................................................. 5-11版本歷史 ........................................................................................................................................................ 5-12第6 章 存儲(chǔ)器構(gòu)成 6-1簡介 ................................................................................................................................................................. 6-2程序存儲(chǔ)器構(gòu)成 ............................................................................................................................................... 6-2數(shù)據(jù)存儲(chǔ)器構(gòu)成 ............................................................................................................................................... 6-8初始化 ........................................................................................................................................................... 6-14設(shè)計(jì)技巧 ........................................................................................................................................................ 6-16相關(guān)應(yīng)用筆記 ................................................................................................................................................. 6-17版本歷史 ........................................................................................................................................................ 6-18第7 章 數(shù)據(jù)EEPROM 7-1簡介 ................................................................................................................................................................. 7-2控制寄存器 ...................................................................................................................................................... 7-3EEADR ............................................................................................................................................................ 7-4EECON1 和EECON2 寄存器 .......................................................................................................................... 7-4從EEPROM 數(shù)據(jù)存儲(chǔ)器中讀數(shù)據(jù) .................................................................................................................... 7-5向EEPROM 數(shù)據(jù)存儲(chǔ)器中寫數(shù)據(jù) .................................................................................................................... 7-5寫校驗(yàn) ............................................................................................................................................................. 7-6誤寫操作保護(hù) ................................................................................................................................................... 7-7代碼保護(hù)配置下的數(shù)據(jù)EEPROM 操作 ............................................................................................................. 7-7初始化 ............................................................................................................................................................. 7-7設(shè)計(jì)技巧 .......................................................................................................................................................... 7-8相關(guān)應(yīng)用筆記 ................................................................................................................................................... 7-9版本歷史 ........................................................................................................................................................ 7-10第8 章 中斷 8-1簡介 ................................................................................................................................................................. 8-2控制寄存器 ...................................................................................................................................................... 8-5中斷響應(yīng)延時(shí) ................................................................................................................................................. 8-10INT 和外部中斷 .............................................................................................................................................. 8-10中斷的現(xiàn)場保護(hù) ............................................................................................................................................. 8-11初始化 ........................................................................................................................................................... 8-14設(shè)計(jì)技巧 ........................................................................................................................................................ 8-16相關(guān)應(yīng)用筆記 ................................................................................................................................................. 8-17版本歷史 ........................................................................................................................................................ 8-18第9 章 I/O 端口 9-1簡介 ................................................................................................................................................................. 9-2PORTA 和TRISA 寄存器 ................................................................................................................................ 9-4PORTB 和TRISB 寄存器 ................................................................................................................................ 9-6PORTC 和TRISC 寄存器 ................................................................................................................................ 9-8PORTD 和TRISD 寄存器 ................................................................................................................................ 9-9PORTE 和TRISE 寄存器 ............................................................................................................................... 9-10PORTF 和 TRISF 寄存器 ............................................................................................................................... 9-11PORTG 和TRISG 寄存器 .............................................................................................................................. 9-12GPIO 和TRISGP 寄存器 ............................................................................................................................... 9-13I/O 編程注意事項(xiàng) ........................................................................................................................................... 9-14初始化 ........................................................................................................................................................... 9-16設(shè)計(jì)技巧 ........................................................................................................................................................ 9-17相關(guān)應(yīng)用筆記 ................................................................................................................................................. 9-19版本歷史 ........................................................................................................................................................ 9-20第10 章 并行從動(dòng)端口 10-1簡介 ............................................................................................................................................................... 10-2控制寄存器 .................................................................................................................................................... 10-3操作 ............................................................................................................................................................... 10-4休眠模式下的操作 ......................................................................................................................................... 10-5復(fù)位的影響 .................................................................................................................................................... 10-5PSP 波形 ....................................................................................................................................................... 10-5設(shè)計(jì)技巧 ........................................................................................................................................................ 10-6相關(guān)應(yīng)用筆記 ................................................................................................................................................. 10-7版本歷史 ........................................................................................................................................................ 10-8 第11 章 TIMER0 11-1簡介 ............................................................................................................................................................... 11-2控制寄存器 .................................................................................................................................................... 11-3操作 ............................................................................................................................................................... 11-4TMR0 中斷 .................................................................................................................................................... 11-5Timer0 外部時(shí)鐘的使用 ................................................................................................................................. 11-6TMR0 的預(yù)分頻器 ......................................................................................................................................... 11-7設(shè)計(jì)技巧 ...................................................................................................................................................... 11-10相關(guān)應(yīng)用筆記 ............................................................................................................................................... 11-11版本歷史 ...................................................................................................................................................... 11-12第12 章 TIMER1 12-1簡介 ............................................................................................................................................................... 12-2控制寄存器 .................................................................................................................................................... 12-3Timer1 工作在定時(shí)器模式 ..............................................................................................................................12-4Timer1 工作在同步計(jì)數(shù)器模式 ....................................................................................................................... 12-4Timer1 工作在異步計(jì)數(shù)器模式 ....................................................................................................................... 12-5Timer1 振蕩器 ............................................................................................................................................... 12-7休眠操作 ........................................................................................................................................................ 12-9用CCP 觸發(fā)器的輸出將Timer1 復(fù)位 ............................................................................................................. 12-9Timer1 寄存器（TMR1H:TMR1L）的復(fù)位 .................................................................................................... 12-9Timer1 預(yù)分頻器 ............................................................................................................................................ 12-9初始化 ......................................................................................................................................................... 12-10設(shè)計(jì)技巧 ...................................................................................................................................................... 12-12相關(guān)應(yīng)用筆記 ............................................................................................................................................... 12-13版本歷史 ...................................................................................................................................................... 12-14第13 章 TIMER2 13-1簡介 ............................................................................................................................................................... 13-2控制寄存器 .................................................................................................................................................... 13-3定時(shí)器時(shí)鐘源 ................................................................................................................................................. 13-4定時(shí)器TMR2 和PR2 周期寄存器 .................................................................................................................. 13-4TMR2 匹配輸出 ............................................................................................................................................. 13-4將Timer2 的預(yù)分頻器和后分頻器清零 ........................................................................................................... 13-4休眠操作 ........................................................................................................................................................ 13-4初始化 ........................................................................................................................................................... 13-5設(shè)計(jì)技巧 ........................................................................................................................................................ 13-6相關(guān)應(yīng)用筆記 ................................................................................................................................................. 13-7版本歷史 ........................................................................................................................................................ 13-8第14 章 比較/ 捕捉/ 脈寬調(diào)制(CCP) 14-1簡介 ............................................................................................................................................................... 14-2控制寄存器 .................................................................................................................................................... 14-3捕捉模式 ........................................................................................................................................................ 14-4比較模式 ........................................................................................................................................................ 14-6PWM 模式 ..................................................................................................................................................... 14-8初始化 ......................................................................................................................................................... 14-12設(shè)計(jì)技巧 ...................................................................................................................................................... 14-15相關(guān)應(yīng)用筆記 ............................................................................................................................................... 14-17版本歷史 ...................................................................................................................................................... 14-18第15 章 同步串行口（SSP） 15-1簡介 ............................................................................................................................................................... 15-2控制寄存器 .................................................................................................................................................... 15-3SPITM 模式 .................................................................................................................................................... 15-6SSP 模塊的I2CTM 操作 ............................................................................................................................... 15-16初始化 ......................................................................................................................................................... 15-26設(shè)計(jì)技巧 ...................................................................................................................................................... 15-28相關(guān)應(yīng)用筆記 ............................................................................................................................................... 15-29版本歷史 ...................................................................................................................................................... 15-30第16 章 基本同步串行口（BSSP） 16-1簡介 ............................................................................................................................................................... 16-2控制寄存器 .................................................................................................................................................... 16-3SPITM 模式 .................................................................................................................................................... 16-6SSP 模塊 的I2CTM 操作 ............................................................................................................................... 16-15初始化 ......................................................................................................................................................... 16-23設(shè)計(jì)技巧 ...................................................................................................................................................... 16-24相關(guān)應(yīng)用筆記 ............................................................................................................................................... 16-25版本歷史 ...................................................................................................................................................... 16-26第17 章 主同步串行口（MSSP） 17-1簡介 ............................................................................................................................................................... 17-2控制寄存器 .................................................................................................................................................... 17-4SPITM 模式 .................................................................................................................................................... 17-9SSP 模塊的 I2C™ 操作 ............................................................................................................................... 17-18I2CTM 總線的連接注意事項(xiàng) ........................................................................................................................... 17-56初始化 ......................................................................................................................................................... 17-57設(shè)計(jì)技巧 ...................................................................................................................................................... 17-58相關(guān)應(yīng)用筆記 ............................................................................................................................................... 17-59版本歷史 ...................................................................................................................................................... 17-60第18 章 USART 18-1簡介 ............................................................................................................................................................... 18-2控制寄存器 .................................................................................................................................................... 18-3USART 波特率發(fā)生器（BRG） ..................................................................................................................... 18-5USART 異步工作模式 ................................................................................................................................... 18-8USART 同步主控模式 .................................................................................................................................. 18-15USART 同步從動(dòng)模式 ................................................................................................................................. 18-19初始化 ......................................................................................................................................................... 18-21設(shè)計(jì)技巧 ...................................................................................................................................................... 18-22相關(guān)應(yīng)用筆記 ............................................................................................................................................... 18-23版本歷史 ...................................................................................................................................................... 18-24第19 章 參考電壓模塊 19-1簡介 ............................................................................................................................................................... 19-2控制寄存器 .................................................................................................................................................... 19-3配置參考電壓 ................................................................................................................................................. 19-4參考電壓精度 ................................................................................................................................................. 19-5休眠模式下的操作 ......................................................................................................................................... 19-5復(fù)位的影響 .................................................................................................................................................... 19-5連接注意事項(xiàng) ................................................................................................................................................. 19-6初始化 ........................................................................................................................................................... 19-7設(shè)計(jì)技巧 ........................................................................................................................................................ 19-8相關(guān)應(yīng)用筆記 ................................................................................................................................................. 19-9版本歷史 ...................................................................................................................................................... 19-10第20 章 比較器 20-1簡介 ............................................................................................................................................................... 20-2控制寄存器 .................................................................................................................................................... 20-3設(shè)置比較器模式 ............................................................................................................................................. 20-4比較器工作原理 ............................................................................................................................................. 20-6比較器參考源 ................................................................................................................................................. 20-6比較器的響應(yīng)時(shí)間 ......................................................................................................................................... 20-8比較器輸出 .................................................................................................................................................... 20-8比較器中斷 .................................................................................................................................................... 20-9休眠狀態(tài)下比較器的操作 ............................................................................................................................... 20-9復(fù)位的影響 .................................................................................................................................................... 20-9模擬輸入連接方式注意事項(xiàng) .......................................................................................................................... 20-10初始化 ......................................................................................................................................................... 20-11設(shè)計(jì)技巧 ...................................................................................................................................................... 20-12相關(guān)應(yīng)用筆記 ............................................................................................................................................... 20-13版本歷史 ...................................................................................................................................................... 20-14第21 章 8 位A/D 轉(zhuǎn)換器 21-1簡介 ............................................................................................................................................................... 21-2控制寄存器 .................................................................................................................................................... 21-3操作 ............................................................................................................................................................... 21-5A/D 采集時(shí)間要求 .......................................................................................................................................... 21-6A/D 轉(zhuǎn)換時(shí)鐘的選擇 ...................................................................................................................................... 21-8配置模擬輸入端口 ......................................................................................................................................... 21-9A/D 轉(zhuǎn)換 ...................................................................................................................................................... 21-10休眠期間的A/D 轉(zhuǎn)換 ................................................................................................................................... 21-12A/D 精度/ 誤差 ............................................................................................................................................ 21-13復(fù)位對A/D 轉(zhuǎn)換的影響 ................................................................................................................................ 21-13CCP 觸發(fā)器的使用 ...................................................................................................................................... 21-14連接注意事項(xiàng) ............................................................................................................................................... 21-14傳遞函數(shù) ...................................................................................................................................................... 21-14初始化 ......................................................................................................................................................... 21-15設(shè)計(jì)技巧 ...................................................................................................................................................... 21-16相關(guān)應(yīng)用筆記 ............................................................................................................................................... 21-17版本歷史 ...................................................................................................................................................... 21-18第22 章 基本型8 位A/D 轉(zhuǎn)換器 22-1簡介 ............................................................................................................................................................... 22-2控制寄存器 .................................................................................................................................................... 22-3A/D 采集時(shí)間要求 .......................................................................................................................................... 22-6A/D 轉(zhuǎn)換時(shí)鐘的選擇 ...................................................................................................................................... 22-8配置模擬輸入端口 ....................................................................................................................................... 22-10A/D 轉(zhuǎn)換 ...................................................................................................................................................... 22-11休眠期間的A/D 轉(zhuǎn)換 ................................................................................................................................... 22-14A/D 轉(zhuǎn)換精度/ 誤差 ..................................................................................................................................... 22-15復(fù)位對A/D 轉(zhuǎn)換的影響 ................................................................................................................................ 22-16連接時(shí)的考慮事項(xiàng) ....................................................................................................................................... 22-16傳遞函數(shù) ...................................................................................................................................................... 22-16初始化 ......................................................................................................................................................... 22-17設(shè)計(jì)技巧 ...................................................................................................................................................... 22-18相關(guān)應(yīng)用筆記 ............................................................................................................................................... 22-19版本歷史 ...................................................................................................................................................... 22-20第23 章 10 位A/D 轉(zhuǎn)換器 23-1簡介 ............................................................................................................................................................... 23-2控制寄存器 .................................................................................................................................................... 23-3操作 ............................................................................................................................................................... 23-5A/D 采集時(shí)間要求 .......................................................................................................................................... 23-6A/D 轉(zhuǎn)換時(shí)鐘的選擇 ...................................................................................................................................... 23-8模擬輸入引腳的設(shè)置 ...................................................................................................................................... 23-9A/D 轉(zhuǎn)換的編程舉例 .................................................................................................................................... 23-10休眠期間的A/D 轉(zhuǎn)換 ................................................................................................................................... 23-14復(fù)位對A/D 轉(zhuǎn)換的影響 ................................................................................................................................ 23-14A/D 轉(zhuǎn)換精度與誤差 .................................................................................................................................... 23-15連接時(shí)的考慮事項(xiàng) ....................................................................................................................................... 23-16傳遞函數(shù) ...................................................................................................................................................... 23-16初始化 ......................................................................................................................................................... 23-17設(shè)計(jì)技巧 ...................................................................................................................................................... 23-18相關(guān)應(yīng)用筆記 ............................................................................................................................................... 23-19版本歷史 ...................................................................................................................................................... 23-20第24 章 積分型A/D 轉(zhuǎn)換器 24-1簡介 ............................................................................................................................................................... 24-2控制寄存器 .................................................................................................................................................... 24-3轉(zhuǎn)換過程 ........................................................................................................................................................ 24-6其它模擬模塊 ............................................................................................................................................... 24-12校準(zhǔn)參數(shù) ...................................................................................................................................................... 24-13設(shè)計(jì)技巧 ...................................................................................................................................................... 24-14相關(guān)應(yīng)用筆記 ............................................................................................................................................... 24-15版本歷史 ...................................................................................................................................................... 24-16第25 章 LCD 25-1簡介 ............................................................................................................................................................... 25-2控制寄存器 .................................................................................................................................................... 25-3LCD 定時(shí) ....................................................................................................................................................... 25-6LCD 中斷 ..................................................................................................................................................... 25-12像素控制 ...................................................................................................................................................... 25-13電壓發(fā)生器 .................................................................................................................................................. 25-15休眠模式下的操作 ....................................................................................................................................... 25-16復(fù)位的影響 .................................................................................................................................................. 25-17LCD 模塊的設(shè)置 .......................................................................................................................................... 25-17判別比 ......................................................................................................................................................... 25-18LCD 電壓發(fā)生器 .......................................................................................................................................... 25-20對比度 ......................................................................................................................................................... 25-22LCD 玻璃基板 .............................................................................................................................................. 25-22初始化 ......................................................................................................................................................... 25-23設(shè)計(jì)技巧 ...................................................................................................................................................... 25-24相關(guān)應(yīng)用筆記 ............................................................................................................................................... 25-25版本歷史 ...................................................................................................................................................... 25-26第26 章 看門狗定時(shí)器與休眠模式 26-1簡介 ............................................................................................................................................................... 26-2控制寄存器 .................................................................................................................................................... 26-3看門狗定時(shí)器（WDT）的操作 ....................................................................................................................... 26-4休眠省電模式 ................................................................................................................................................. 26-7初始化 ........................................................................................................................................................... 26-9設(shè)計(jì)技巧 ...................................................................................................................................................... 26-10相關(guān)應(yīng)用筆記 ............................................................................................................................................... 26-11版本歷史 ...................................................................................................................................................... 26-12第27 章 器件配置位 27-1簡介 ............................................................................................................................................................... 27-2配置字位 ........................................................................................................................................................ 27-4編程校驗(yàn)/ 代碼保護(hù) ....................................................................................................................................... 27-8識(shí)別碼ID 的位置 ........................................................................................................................................... 27-9設(shè)計(jì)技巧 ...................................................................................................................................................... 27-10相關(guān)應(yīng)用筆記 ............................................................................................................................................... 27-11版本歷史 ...................................................................................................................................................... 27-12第28 章 在線串行編程 28-1簡介 ............................................................................................................................................................... 28-2進(jìn)入在線串行編程模式 .................................................................................................................................. 28-3應(yīng)用電路 ........................................................................................................................................................ 28-4編程器 ........................................................................................................................................................... 28-6編程環(huán)境 ........................................................................................................................................................ 28-6其它優(yōu)點(diǎn) ........................................................................................................................................................ 28-7PICmicro® OTP 型單片機(jī)的現(xiàn)場編程 ............................................................................................................. 28-8FLASH 型 PICmicro® 單片機(jī)的現(xiàn)場編程 ...................................................................................................... 28-10設(shè)計(jì)技巧 ...................................................................................................................................................... 28-12相關(guān)應(yīng)用筆記 ............................................................................................................................................... 28-13版本歷史 ...................................................................................................................................................... 28-14第29 章 指令集 29-1簡介 ............................................................................................................................................................... 29-2指令格式 ........................................................................................................................................................ 29-4作為源/ 目標(biāo)寄存器的特殊功能寄存器 ........................................................................................................... 29-6Q 周期操作 .................................................................................................................................................... 29-7指令描述 ........................................................................................................................................................ 29-8設(shè)計(jì)技巧 ...................................................................................................................................................... 29-45相關(guān)應(yīng)用筆記 ............................................................................................................................................... 29-47版本歷史 ...................................................................................................................................................... 29-48第30 章 電氣規(guī)范 30-1簡介 ............................................................................................................................................................... 30-2絕對最大值 .................................................................................................................................................... 30-3器件選型表 .................................................................................................................................................... 30-4器件電壓規(guī)范 ................................................................................................................................................. 30-5器件電流特性 ................................................................................................................................................. 30-6輸入閾值電平 ................................................................................................................................................. 30-9I/O 電流特性 ................................................................................................................................................ 30-10輸出驅(qū)動(dòng)電壓 ............................................................................................................................................... 30-11I/O 引腳的容性負(fù)載 ..................................................................................................................................... 30-12數(shù)據(jù)EEPROM / 閃存 .................................................................................................................................. 30-13LCD ............................................................................................................................................................. 30-14比較器和參考電壓 ....................................................................................................................................... 30-15時(shí)序參數(shù)符號(hào) ............................................................................................................................................... 30-16外部時(shí)鐘時(shí)序波形圖和時(shí)序要求示例 ............................................................................................................ 30-17上電和復(fù)位時(shí)序波形圖及要求示例 ............................................................................................................... 30-19定時(shí)器Timer0 和Timer1 時(shí)序波形圖及要求示例 ......................................................................................... 30-20CCP 的時(shí)序圖及要求 ................................................................................................................................... 30-21并行從動(dòng)端口 (PSP) 時(shí)序圖及要求 .............................................................................................................. 30-22SSP 和 MSSP SPITM 模式時(shí)序波形圖及要求示例 ....................................................................................... 30-23SSP I2CTM 模式時(shí)序波形圖及要求示例 ........................................................................................................ 30-27MSSP I2CTM 模式時(shí)序波形圖及要求示例 ..................................................................................................... 30-30USART/SCI 時(shí)序波形圖及要求示例 ............................................................................................................. 30-328 位 A/D 時(shí)序波形圖及要求示例 ................................................................................................................... 30-3410 位A/D 時(shí)序波形圖及要求示例 ................................................................................................................. 30-36積分型A/D 時(shí)序波形圖及要求示例 ............................................................................................................... 30-38LCD 時(shí)序波形圖及要求示例 ......................................................................................................................... 30-40相關(guān)應(yīng)用筆記 ............................................................................................................................................... 30-41版本歷史 ...................................................................................................................................................... 30-42第31 章 器件特性 31-1簡介 ............................................................................................................................................................... 31-2特性和電氣規(guī)范 ............................................................................................................................................. 31-2DC 和AC 特性圖表 ....................................................................................................................................... 31-2版本歷史 ...................................................................................................................................................... 31-22第32 章 開發(fā)工具 32-1簡介 ............................................................................................................................................................... 32-2集成開發(fā)環(huán)境（IDE） ................................................................................................................................... 32-3MPLAB® 軟件語言支持 ................................................................................................................................. 32-6MPLAB® SIM 軟件模擬器 ............................................................................................................................... 32-8MPLAB® 硬件仿真器支持 ............................................................................................................................... 32-9MPLAB® 編程器支持 ................................................................................................................................... 32-10輔助工具 ...................................................................................................................................................... 32-11開發(fā)板 ......................................................................................................................................................... 32-12針對其它Microchip 產(chǎn)品的開發(fā)工具 ............................................................................................................ 32-14相關(guān)應(yīng)用筆記 ............................................................................................................................................... 32-15版本歷史 ...................................................................................................................................................... 32-16第33 章 代碼開發(fā) 33-1版本歷史 ........................................................................................................................................................ 33-2第34 章 附錄 34-1I2CTM 概述...................................................................................................................................................... 34-2LCD 玻璃基板生產(chǎn)商.................................................................................................................................... 34-11改進(jìn)的器件特性............................................................................................................................................ 34-13版本歷史....................................................................................................................................................... 34-19第35 章 術(shù)語表 35-1版本歷史 ...................................................................................................................................................... 35-14目錄
上傳時(shí)間： 2013-11-15
上傳用戶：nanshan
了解各種D觸發(fā)器
上傳時(shí)間： 2013-10-09
上傳用戶：shawvi
其他控制模式： a、16bit/65536 級(jí)灰度模式，暫未開放10bit/1024 級(jí)灰度模式； b、每幀都會(huì)發(fā)送逐點(diǎn)校正數(shù)據(jù)和配置寄存器數(shù)據(jù)； c、配置寄存器1（CF1）使能奇偶校驗(yàn)，防止MBI6024 進(jìn)入未知狀態(tài)； d、配置寄存器2（CF2）設(shè)定“CKI 逾時(shí)時(shí)間”為“95～172 CKI 周期”；
上傳時(shí)間： 2013-11-11
上傳用戶：xingyuewubian
了解各種D觸發(fā)器
上傳時(shí)間： 2013-10-29
上傳用戶：wwwe
基于VHDL的FPGA和Nios II 實(shí)例精煉【作者：劉福奇；出版社：北京航空航天大學(xué)出版社】（本書優(yōu)酷視頻地址：http://www.youku.com/playlist_show/id_5882081.html） 內(nèi)容簡介：本書分為4個(gè)部分：Quartus Ⅱ軟件的基本操作、VHDL語法介紹、FPGA設(shè)計(jì)實(shí)例和Nios Ⅱ設(shè)計(jì)實(shí)例；總結(jié)了編者幾年來的FPGA設(shè)計(jì)經(jīng)驗(yàn)，力求給初學(xué)者或是想接觸這方面知識(shí)的讀者提供一種快速入門的方法；適合電子相關(guān)專業(yè)的大學(xué)生、FPGA的初學(xué)者以及對FPGA有興趣的電子工程師。初學(xué)者可以按照步驟學(xué)習(xí)。本書中提及到時(shí)間計(jì)算問題，不光提出有時(shí)間戳的方法， 還介紹了一種通過讀取定時(shí)器的寄存器來計(jì)算時(shí)間的方法。其實(shí)，有人認(rèn)為，本書最好的部分是：DMA的實(shí)現(xiàn)說明（本書從3個(gè)方面講述了DMA的使用）。現(xiàn)在學(xué)習(xí)Verilog HDL的人或許比較多，但是用VHDL的人可以學(xué)習(xí)下，這本書還是很不錯(cuò)的。
上傳時(shí)間： 2014-07-10
上傳用戶：米米陽123
上海日虹變頻器D系列
上傳時(shí)間： 2013-11-15
上傳用戶：fengzimili
PSGJR-D硅橡膠電加熱板介紹
上傳時(shí)間： 2013-10-08
上傳用戶：遠(yuǎn)遠(yuǎn)ssad
PSGKC-D型開關(guān)機(jī)械特性測試儀，是我公司針對各種高壓開關(guān)研制的一種通用型電腦智能化測試儀器。該儀器應(yīng)用光電脈沖技術(shù)，單片計(jì)算機(jī)技術(shù)及可靠的抗電磁輻射技術(shù)，配以精確可靠的速度/距離傳感器，可用于各種電壓等級(jí)的真空、六氟化硫、少油、多油等高壓開關(guān)的機(jī)械性參數(shù)的調(diào)試與測量。 公司：揚(yáng)州品勝電氣科技有限公司 地址：江蘇寶應(yīng)開發(fā)區(qū)安宜東路284號(hào) 電話：0514-88992611 傳真：0514-88268181 88992611 手機(jī)：13382732611 13705255281 網(wǎng)址：http://www.yzpsdq.com 郵箱：88992611@yzpsdq.com ＱＱ: 987006099 1014936215 聯(lián)系人：張春華
標(biāo)簽： PSGKC-D 高壓開關(guān) 測試儀
上傳時(shí)間： 2013-10-15
上傳用戶：腳趾頭
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