【正文】 64位光刻 ROM、 溫度傳感器、非揮發(fā)的溫度報警觸發(fā)器 TH和 TL、配置寄存器。當工作于寄生電源時，此引腳必須接地。 另外，由于 DS18B20 單線通信功能是分時完成的，有嚴格的時隙概念，因此讀寫時序很重要。 系統(tǒng)軟件設計 ：實驗主程序流程圖 基于 STC89C52 的數(shù)字溫度計 9 ：溫度傳感器數(shù)據(jù)讀取流程圖 基于 STC89C52 的數(shù)字溫度計 10 編程和仿真 編程軟件 Keil4 Keil C51 是美國 Keil software 公司出品的 51 系列兼容單片機 C 語言軟件開發(fā)系統(tǒng)，與匯編相比， C 語言在功能上、結構性、可讀 性、可維護性上有明顯的優(yōu)勢，因而易學易用。 仿真軟件 Proteus 軟件是 Labcenter electronics 公司出版的 EDA 工具軟件（該軟件中國總代理為廣州風標電子技術有限公司）。 Proteus 是世界上著名的 EDA 工具 （仿真軟件） ，從原理圖布圖、代 碼調試 到單片機 與外圍電路協(xié)同仿真，一鍵切換到 PCB 設計，真正實現(xiàn)了從概念到產(chǎn)品的完整設計。 在進行電路實際制作之前，應該用仿真軟件進行仿真 ,可以使開發(fā)進程加快。 //液晶 使能端 sbit DATA = P3^7。//負數(shù)標志 uchar code table[]={tempreture:} 。x) for(y=110。 } /*液晶寫命令 */ void write_lcd_(uchar ) { rs=0。 lcden=1。 lcden=0。 delay_ms(1)。 write_lcd_(0x06)。 //DQ 復位 delay(10)。 //拉高總線 delay(20)。 uchar dat = 0。 // 給脈沖信號 dat=1。 } 基于 STC89C52 的數(shù)字溫度計 14 return(dat)。 i) { DATA = 0。 DATA = 1。 uchar b=0。 WriteOneChar(0xCC)。 //跳過讀序號列號的操作 WriteOneChar(0xBE)。 t=8。 flag_Negative_number = 1。 return(t)。//顯示十位 shi_18b20=temp%100/10。 write_lcd_date(0x30+shi_18b20)。 } else { write_lcd_(0x80+0x40)。 write_lcd_date(0xDF)。 write_lcd_date(0x2E)。 基于 STC89C52 的數(shù)字溫度計 16 } else { write_lcd_(0x80+0x40)。 write_lcd_date(0x30+ge_18b20)。 TMOD=0x01。 ET0=1。num11。 while(1) { if(FLAG_DIS==1) { FLAG_DIS=0。 基于 STC89C52 的數(shù)字溫度計 17 TL0=(6553650000)%256。 } } g an employment tribunal clai Employment tribunals sort out disagreements between employers and employees. You may need to make a claim to an employment tribunal if: ? you don39。re clear about the terms of the agreement. It might be best to get advice from an experienced adviser, for example, at a Citizens Advice Bureau. To find your nearest CAB, including those that give advice by , click on nearest CAB. For more information about making a claim to an employment tribunal, see Employment tribunals. The (lack of) air up there Watch mCayman Islandsbased Webb, the head of Fifa39。s about how he felt and I would like to speak to him first to find out what his experience was. Uefa has opened disciplinary proceedings against CSKA for the racist behaviour of their fans during City39。s plaint. In a statement the Russian side added: We found no racist insults from fans of CSKA. Age has reached the end of the beginning of a word. May be guilty in his seems to passing a lot of different life became the appearance of the same day。二十年的人生軌跡深深淺淺，突然就感覺到有些事情，非做不可了。 Then in high school, think don39。 A person39。嫌惡過自己的怯懦，最終卻發(fā)現(xiàn)有很多 緣分 ，有很多錯過，好像冥冥之中真的已經(jīng)注定。 From the corner at the beginning of deep friendship。 Baumgartner the disappointing news: Mission aborted. r plays an important role in this mission. Starting at the ground, conditions have to be very calm winds less than 2 mph, with no precipitation or humidity and limited cloud cover. The balloon, with capsule attached, will move through the lower level of the atmosphere (the troposphere) where our daytoday weather lives. It will climb higher than the tip of Mount Everest ( miles/ kilometers), drifting even higher than the cruising altitude of mercial airliners ( miles/ kilometers) and into the stratosphere. As he crosses the boundary layer (called the tropopause),e can expect a lot of turbulence. The supersonic descent could happen as early as Sunda. The weatheThe balloon will slowly drift to the edge of space at 120,000 feet ( Then, I would assume, he will slowly step out onto something resembling an Olympic diving platform. Below, the Earth bees the concrete bottom of a swimming pool that he wants to land on, but not too hard. Still,