The LTM4601 DC/DC μModule regulator is a completehigh power density stepdown regulator for up to 12Acontinuous (14A peak) loads. The device is housed ina small 15mm ¥ 15mm ¥ 2.8mm LGA surface mountpackage, thus the large power dissipation is a challengein some applications. This thermal application note willprovide guidelines for using the μModule regulator inambient environments with or without air fl ow. Loadcurrent derating curves are provided for several inputvoltages and output voltages versus ambient temperatureand air fl ow.
上傳時(shí)間： 2013-10-19
上傳用戶：bakdesec
The LTM4600 DC/DC μModule regulator is a complete highpower density stepdown regulator for 10A continuous (14Apeak) loads. The device has two voltage options: 20VINmaximum for the LTM4600EV and 28VIN maximum for theLTM4600HVEV each housed in a small 15mm ¥ 15mm ¥2.8mm LGA surface mount package.
上傳時(shí)間： 2013-10-10
上傳用戶：adada
The latest generation of Texas Instruments (TI) boardmountedpower modules utilizes a pin interconnect technologythat improves surface-mount manufacturability.These modules are produced as a double-sided surfacemount(DSSMT) subassembly, yielding a case-less constructionwith subcomponents located on both sides of theprinted circuit board (PCB). Products produced in theDSSMT outline use the latest high-efficiency topologiesand magnetic-component packaging. This providescustomers with a high-efficiency, ready-to-use switchingpower module in a compact, space-saving package. Bothnonisolated point-of-load (POL) switching regulators andthe isolated dc/dc converter modules are being producedin the DSSMT outline.TI’s plug-in power product line offers power modules inboth through-hole and surface-mount packages. The surfacemountmodules produced in the DSSMT outline use asolid copper interconnect with an integral solder ball fortheir
上傳時(shí)間： 2013-10-10
上傳用戶：1184599859
TLC2543是TI公司的12位串行模數(shù)轉(zhuǎn)換器，使用開關(guān)電容逐次逼近技術(shù)完成A/D轉(zhuǎn)換過程。由于是串行輸入結(jié)構(gòu)，能夠節(jié)省51系列單片機(jī)I/O資源；且價(jià)格適中，分辨率較高，因此在儀器儀表中有較為廣泛的應(yīng)用。 TLC2543的特點(diǎn) （1）12位分辯率A/D轉(zhuǎn)換器； （2）在工作溫度范圍內(nèi)10μs轉(zhuǎn)換時(shí)間； （3）11個(gè)模擬輸入通道； （4）3路內(nèi)置自測(cè)試方式； （5）采樣率為66kbps； （6）線性誤差±1LSBmax； （7）有轉(zhuǎn)換結(jié)束輸出EOC； （8）具有單、雙極性輸出； （9）可編程的MSB或LSB前導(dǎo)； （10）可編程輸出數(shù)據(jù)長度。 TLC2543的引腳排列及說明 TLC2543有兩種封裝形式：DB、DW或N封裝以及FN封裝，這兩種封裝的引腳排列如圖1，引腳說明見表1 TLC2543電路圖和程序欣賞 #include<reg52.h> #include<intrins.h> #define uchar unsigned char #define uint unsigned int sbit clock=P1^0; sbit d_in=P1^1; sbit d_out=P1^2; sbit _cs=P1^3; uchar a1,b1,c1,d1; float sum,sum1; double sum_final1; double sum_final; uchar duan[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f}; uchar wei[]={0xf7,0xfb,0xfd,0xfe}; void delay(unsigned char b) //50us { unsigned char a; for(;b>0;b--) for(a=22;a>0;a--); } void display(uchar a,uchar b,uchar c,uchar d) { P0=duan[a]|0x80; P2=wei[0]; delay(5); P2=0xff; P0=duan[b]; P2=wei[1]; delay(5); P2=0xff; P0=duan[c]; P2=wei[2]; delay(5); P2=0xff; P0=duan[d]; P2=wei[3]; delay(5); P2=0xff; } uint read(uchar port) { uchar i,al=0,ah=0; unsigned long ad; clock=0; _cs=0; port<<=4; for(i=0;i<4;i++) { d_in=port&0x80; clock=1; clock=0; port<<=1; } d_in=0; for(i=0;i<8;i++) { clock=1; clock=0; } _cs=1; delay(5); _cs=0; for(i=0;i<4;i++) { clock=1; ah<<=1; if(d_out)ah|=0x01; clock=0; } for(i=0;i<8;i++) { clock=1; al<<=1; if(d_out) al|=0x01; clock=0; } _cs=1; ad=(uint)ah; ad<<=8; ad|=al; return(ad); } void main() { uchar j; sum=0;sum1=0; sum_final=0; sum_final1=0; while(1) { for(j=0;j<128;j++) { sum1+=read(1); display(a1,b1,c1,d1); } sum=sum1/128; sum1=0; sum_final1=(sum/4095)*5; sum_final=sum_final1*1000; a1=(int)sum_final/1000; b1=(int)sum_final%1000/100; c1=(int)sum_final%1000%100/10; d1=(int)sum_final%10; display(a1,b1,c1,d1); } }
上傳時(shí)間： 2013-11-19
上傳用戶：shen1230
為滿足礦井安全生產(chǎn)要求，介紹了一種以AT89C51單片機(jī)為主控器，對(duì)環(huán)境空氣的溫度、有毒易燃?xì)怏w的濃度等進(jìn)行檢測(cè)的監(jiān)控系統(tǒng)。該系統(tǒng)配合外圍電路能實(shí)現(xiàn)對(duì)上述環(huán)境指標(biāo)的控制并存儲(chǔ)相關(guān)數(shù)據(jù)與上位PC機(jī)通信。它采用硬件抗干擾和軟件抗干擾技術(shù)，以確保整個(gè)系統(tǒng)工作的準(zhǔn)確性。 Abstract: In order to meet the needs of mine produce safety，a kind of intellignet mine ambient monotoring and control system based on AT89C51 is introduced.This system can detect the temperature of ambient of mine，the density of poisonous inflammable gas,combined external circuit.With its function part， this system can change above-mentioned elements.
上傳時(shí)間： 2013-11-10
上傳用戶：wendy15
LLCR Pin Socket Testing with the Model 3732 High Density Matrix Card Computer processors (CPUs) today have come a long way from the computer processors of the past. They draw more power, run at lower voltages, and have more pins than ever before.
標(biāo)簽： Testing Socket LLCR with
上傳時(shí)間： 2013-10-24
上傳用戶：whenfly
C51 中的關(guān)鍵字關(guān)鍵字 用途 說明auto 存儲(chǔ)種類說明 用以說明局部變量，缺省值為此break 程序語句 退出最內(nèi)層循環(huán)case 程序語句 Switch 語句中的選擇項(xiàng)char 數(shù)據(jù)類型說明 單字節(jié)整型數(shù)或字符型數(shù)據(jù)const 存儲(chǔ)類型說明 在程序執(zhí)行過程中不可更改的常量值continue 程序語句 轉(zhuǎn)向下一次循環(huán)default 程序語句 Switch 語句中的失敗選擇項(xiàng)do 程序語句 構(gòu)成do..while 循環(huán)結(jié)構(gòu)double 數(shù)據(jù)類型說明 雙精度浮點(diǎn)數(shù)else 程序語句 構(gòu)成if..else 選擇結(jié)構(gòu)enum 數(shù)據(jù)類型說明 枚舉extern 存儲(chǔ)種類說明 在其他程序模塊中說明了的全局變量flost 數(shù)據(jù)類型說明 單精度浮點(diǎn)數(shù)for 程序語句 構(gòu)成for 循環(huán)結(jié)構(gòu)goto 程序語句 構(gòu)成goto 轉(zhuǎn)移結(jié)構(gòu)if 程序語句 構(gòu)成if..else 選擇結(jié)構(gòu)int 數(shù)據(jù)類型說明 基本整型數(shù)long 數(shù)據(jù)類型說明 長整型數(shù)register 存儲(chǔ)種類說明 使用CPU 內(nèi)部寄存的變量return 程序語句 函數(shù)返回short 數(shù)據(jù)類型說明 短整型數(shù)signed 數(shù)據(jù)類型說明 有符號(hào)數(shù)，二進(jìn)制數(shù)據(jù)的最高位為符號(hào)位sizeof 運(yùn)算符 計(jì)算表達(dá)式或數(shù)據(jù)類型的字節(jié)數(shù)static 存儲(chǔ)種類說明 靜態(tài)變量struct 數(shù)據(jù)類型說明 結(jié)構(gòu)類型數(shù)據(jù)swicth 程序語句 構(gòu)成switch 選擇結(jié)構(gòu)typedef 數(shù)據(jù)類型說明 重新進(jìn)行數(shù)據(jù)類型定義union 數(shù)據(jù)類型說明 聯(lián)合類型數(shù)據(jù)unsigned 數(shù)據(jù)類型說明 無符號(hào)數(shù)數(shù)據(jù)void 數(shù)據(jù)類型說明 無類型數(shù)據(jù)volatile 數(shù)據(jù)類型說明 該變量在程序執(zhí)行中可被隱含地改變while 程序語句 構(gòu)成while 和do..while 循環(huán)結(jié)構(gòu)ANSIC 標(biāo)準(zhǔn)關(guān)鍵字關(guān)鍵字 用途 說明bit 位標(biāo)量聲明 聲明一個(gè)位標(biāo)量或位類型的函數(shù)sbit 位標(biāo)量聲明 聲明一個(gè)可位尋址變量
標(biāo)簽： C51
上傳時(shí)間： 2013-10-08
上傳用戶：waves_0801
keil 使用筆記:在Memory窗口上輸入address_type:address才能看到正確地址的變量debug～perfermance analyzer加入要察看的模塊名稱，然后view～perfermance analyzer window 可以察看各個(gè)模塊運(yùn)行時(shí)間①Display address_type:address B:Bit address C:Code Memory Bx:Code Bank D D：80H 命令可以查看特殊寄存器 data D I：0 命令可以查看內(nèi)部RAM數(shù)據(jù)iData； D X：0 命令可以查看外部RAM數(shù)據(jù)xData； ②R1 //顯示R1 register ~R1 //顯示變量R1 R1 = R7 //對(duì)寄存器Rx操作R1 = --R7 R1 = 0x20 ③main //顯示main()的開始地址d main //顯示main()的代碼④向RAM.ROM中寫數(shù)據(jù)Enter data_type address_type:address expr,expr.... data_type:int char double float long E char data:0x20 1,2,3,4 //向data區(qū)0x20開始的地址寫1,2,3,4 變量放在RAM的30H，要把定義放在main前面!另外特別注意，內(nèi)部RAM通常供C程序存放中間變量等，所以一定要看看編譯后的程序中是否存在存儲(chǔ)單元沖突的情況，比如如果程序中 使用了別的寄存器組的話，08-1FH單元就不能用了unsigned long data i _at_ 0x30
上傳時(shí)間： 2013-11-05
上傳用戶：dongqiangqiang
SPCE061A單片機(jī)硬件結(jié)構(gòu) 從第一章中SPCE061A的結(jié)構(gòu)圖可以看出SPCE061A的結(jié)構(gòu)比較簡單，在芯片內(nèi)部集成了ICE仿真電路接口、FLASH程序存儲(chǔ)器、SRAM數(shù)據(jù)存儲(chǔ)器、通用IO端口、定時(shí)器計(jì)數(shù)器、中斷控制、CPU時(shí)鐘、模-數(shù)轉(zhuǎn)換器AD、DAC輸出、通用異步串行輸入輸出接口、串行輸入輸出接口、低電壓監(jiān)測(cè)低電壓復(fù)位等若干部分。各個(gè)部分之間存在著直接或間接的聯(lián)系，在本章中我們將詳細(xì)的介紹每個(gè)部分結(jié)構(gòu)及應(yīng)用。2.1 μ’nSP™的內(nèi)核結(jié)構(gòu)μ’nSP™的內(nèi)核如0所示其結(jié)構(gòu)。它由總線、算術(shù)邏輯運(yùn)算單元、寄存器組、中斷系統(tǒng)及堆棧等部分組成，右邊文字為各部分簡要說明。算術(shù)邏輯運(yùn)算單元ALUμ’nSP™的ALU在運(yùn)算能力上很有特色，它不僅能做16位基本的算術(shù)邏輯運(yùn)算，也能做帶移位操作的16位算術(shù)邏輯運(yùn)算，同時(shí)還能做用于數(shù)字信號(hào)處理的16位×16位的乘法運(yùn)算和內(nèi)積運(yùn)算。1． 16位算術(shù)邏輯運(yùn)算不失一般性，μ’nSP™與大多數(shù)CPU類似，提供了基本的算術(shù)運(yùn)算與邏輯操作指令，加、減、比較、取補(bǔ)、異或、或、與、測(cè)試、寫入、讀出等16位算術(shù)邏輯運(yùn)算及數(shù)據(jù)傳送操作。2． 帶移位操作的16位算邏運(yùn)算對(duì)圖2.1稍加留意，就會(huì)發(fā)現(xiàn)μ’nSP™的ALU前面串接有一個(gè)移位器SHIFTER，也就是說，操作數(shù)在經(jīng)過ALU的算邏操作前可先進(jìn)行移位處理，然后再經(jīng)ALU完成算邏運(yùn)算操作。移位包括：算術(shù)右移、邏輯左移、邏輯右移、循環(huán)左移以及循環(huán)右移。所以，μ’nSP™的指令系統(tǒng)里專有一組復(fù)合式的‘移位算邏操作’指令；此一條指令完成移位和算術(shù)邏輯操作兩項(xiàng)功能。程序設(shè)計(jì)者可利用這些復(fù)合式的指令，撰寫更精簡的程序代碼，進(jìn)而增加程序代碼密集度 (Code Density)。在微控制器應(yīng)用中，如何增加程序代碼密集度是非常重要的議題；提高程序代碼密集度意味著：減少程序代碼的大小，進(jìn)而減少ROM或FLASH的需求，以此降低系統(tǒng)成本與增加執(zhí)行效能。
標(biāo)簽： SPCE 061A 061 單片機(jī)
上傳時(shí)間： 2013-10-10
上傳用戶：星仔
In this document, the term Ô60xÕ is used to denote a 32-bit microprocessor from the PowerPC architecture family that conforms to the bus interface of the PowerPC 601ª, PowerPC 603ª, or PowerPC 604 microprocessors. Note that this does not include the PowerPC 602ª microprocessor which has a multiplexed address/data bus. 60x processors implement the PowerPC architecture as it is speciÞed for 32-bit addressing, which provides 32-bit effective (logical) addresses, integer data types of 8, 16, and 32 bits,and ßoating-point data types of 32 and 64 bits (single-precision and double-precision).1.1 Overview The MPC106 provides an integrated high-bandwidth, high-performance, TTL-compatible interface between a 60x processor, a secondary (L2) cache or additional (up to four total) 60x processors, the PCI bus,and main memory. This section provides a block diagram showing the major functional units of the 106 and describes brießy how those units interact.Figure 1 shows the major functional units within the 106. Note that this is a conceptual block diagram intended to show the basic features rather than an attempt to show how these features are physically implemented on the device.
標(biāo)簽： Bridge Memory Contr MPC
上傳時(shí)間： 2013-10-08
上傳用戶：18711024007
蟲蟲下載站版權(quán)所有 京ICP備2021023401號(hào)-1
