chip select 中文意思是什麼
chip select
解釋
晶元選擇-
Blue chip companies are using psychometric personality tests to select graduate employees because they no longer trust university degrees, a report says today
今天一則報道說，藍籌公司採用心理個性測驗來挑選畢業生員工，因為他們再也不相信大學文憑了。 -
In order to calculate easily and do n ' t influence the single - chip microcomputer ' s calculate velocity, we put forward two scheme to deal with the numerical value, one is to use a simple function to close or approach a normal function f ( x ) ( mainly is lagrange ' s intepolation, newton ' s intepolation, hermite ' s intepolation, cubic spline interpolation, etc. ) the other one is function approach ( mainly is chebyshev ' s polynomic. legendre ' s polynomic, laguerre ' s polynomic, method of least squares, etc. ), we analyze and compare the lagrange ' s intepolation and chebyshev ploynomic, at last, we select the chebyshev polynomic to do the value calculating on single - chip microcomputer
提出了數值處理的二種方案。即用簡單函數近似或逼近一個一般函數f （ x ） （主要有拉格朗日插值、牛頓插值、埃爾米特插值、三次樣條插值等）和函數逼近（主要有切比雪夫多項式、勒讓德多項式、拉蓋爾多項式、最小二乘法等） ，對上述兩個方案中的典型函數?拉格朗日插值和切比雪夫多項式進行了分析比較，最後選取切比雪夫多項式完成單片機上的數值計算。 -
Digital signal processor ( dsp ) combined with repm bldcm, which build up a dc adjustable speed system, achieve to control multiple motor speed, positive and negative rotate, protect and fault exemine by a true single chip. design and present a electromagnetism scheme of repm bldcm used in electromotion chair drive system. select electronical components and chips in the drive board by contrast with variant drive mode. design the drive board principle picture, make a drive board pcb and debug it. design a principle picture with dsp core. workout the motor control code introduced popular programme modle. test the programme reliability and control performance by linking tms320lf2407 evm, pc, drive borad and the bldcm. the bldcm swatch is prepare experiment
本論文闡述了方波驅動稀土永磁無刷直流電動機的原理及數學模型；設計並給出了一種電動座椅用稀土永磁無刷直流電動機的電磁設計方案；對電機採用何種驅動方式進行了對比分析；對驅動電路進行了元器件選型、原理圖設計、制板及調試；有針對性的闡述了dsp在本系統應用中所涉及到的功能模塊；設計了以dsp為核心的控制電路原理圖；以模塊化的軟體編程思想編制了電機控制軟體；通過tms320lf2407目標板、上位機、驅動板及電機的聯調，證明了系統可行。 -
In the design of lan ip telephone, the author has participated in the follow works : the systemdesign ; select chips, make the schematic circuit and pcb board of the main data processing board and debug it. the fpga design, simulation and debugging of receiving part of lan ip main chip
我在項目中完成的工作：與項目組成員合作制定系統方案及根據要求選擇晶元，設計數據處理主板，製作pcb板並加以調試；數據處理主板中的局域網ip電話機主晶元中接收部分的fpga設計、模擬和調試。 -
The chip is mainly applied to the portable electronic products with the following features : 2. 7v to 5. 5v input voltage range ; the 1mhz fixed frequency ; - 40 to + 85 operating temperature ; two digital inputs control on / off and select amongst three levels of brightness ; thermal shutdown and under voltage shutdown protection, low 0. 1 a shutdown current ; soft - start limits inrush current
該晶元主要應用於便攜式電子產品，其輸入電壓范圍為2 . 7 5 . 5v ，工作頻率為固定的1mhz ，可大幅度降低輸入紋波和emi輻射，工作溫度范圍為- 40 + 85 ，可使用外部使能控制信號調節led亮度及控制晶元關斷與否，具有過溫保護和輸入欠壓關斷保護功能，完全關斷模式下關斷電流可低至0 . 1 a ，具有軟啟動功能以限制啟動時的浪涌電流。 -
First, this paper introduced the method to select the strain chip measurement positions and organize the bridges and proved this method can decouple the outputs of the multi - component transducer for each variable. meanwhile, this paper deduced the relation equations between multi - component signals and the wheel loads
本文首先介紹了應變片測量點選取和組橋方案，證明了該設計可使多維力輸出信號解耦，並推導了傳感器信號與多維力之間的關系方程。 -
Chip select generator
片選信號自動生成 -
We also select the microchip pic16f877 made by microchip co. ltd as a control chip to realize micro - computer control. this system use three separate channel to find out the " across the zero point " of each back - emf. the program use digital filter to wipe off the pwm interferences and the commutating interferences
系統中採用三個獨立通道分別檢測無刷電機三相繞組的反電勢的各自過零點，同時在軟體中採用數字濾波以消除其它噪聲干擾，使檢測電路檢測到的反電勢過零點更加準確可靠，實現了對五位置傳感器直流無刷電機的數字控制。 -
In the course of design, we fully consider the actual conditions on the railway and take a series of corresponding measures to the concrete problem. such as we select high - accuracy microconvertor and have the converted function in succession data collecting system chip aduc812, design v / f circuit and external a / d circuit. in anti - interference of the hardware, we try to disperse each function module to avoid interfering each other, adopt photoelectric isolated technology to dispel the circuit connection of input and output. in controlling we import arithmetic mean into strain wave algorithm and real computing technology of virtual value for sample treatment of data, that is using the software to smooth away interfere error and to calculate actual value, thus it makes the precision of the data improve greatly
在設計過程中，根據系統要求，充分考慮鐵路上的實際情況，針對具體問題採取了一系列的相應措施，如在器件選擇方面選用高精度microconvertor系列、具有adcdma連續轉換功能的數據採集微控制器晶元aduc812 ，設計了v f變換電路和外部a d轉換電路；在硬體抗干擾方面，將每個功能模塊盡量分散獨立開來以避免相互干擾、採用光電隔離技術消除輸入輸出通道上的電路聯系；在控制方面對于采樣數據的處理引入了算術平均值濾波演算法和真有效值的計算方法，即通過使用軟體來濾除系統中有干擾造成的誤差並計算真值，從而使數據的準確性得到極大地提高。 -
The use of mc33291 chip improves the performance of the device. moreover, for data disposal, we select the algorithm of the combination of fourier and difference algorithm. in the end, we present the interference - free methods in software and hardware of devices
此外，交流量採集完成後數據的處理將尤為重要，本文提出了用差分法消除傅氏所不能濾除的衰減直流分量，採用傅氏和差分相結合的演算法;對于保護中經常遇到的開方運算，提出了逐次比較法對其進行計算。 -
The task uses the microelectronics technology and single - chip technology and utilizes microprocessor to develop the mini - intelligence releaser. it can not only fulfill the function of releasing, i. e. fulfill the protecting function which is pre - designed, but also select the parameters of motion, i. e. it can realize protecting in the multi - situations
本課題利用微電子技術及單片機技術，採用微處理器，設計出小型的智能脫扣器，不僅能夠實現脫扣功能，即實現預想的保護功能，還能對脫扣器的動作參數進行選擇即可實現對多種不同場合的保護。 -
Accoridng to the target and preceding analyses, we select ad9850 for dds chip, pe3236 for pll chip, and mcu pic16f874 for loading control word and realizing control function. afterward, we design and simulate the lc filter, microstrip low - pass filter and coupler, then implement the frequency synthesis. finally ， the circuit is tested and the target is obtained
根據指標的要求和上面的分析， dds晶元採用ad9850 ， pll晶元採用pe3236 ，控制字的載入及控制功能的實現由單片機pic16f874來實現，並對其中的lc濾波器、微帶低通濾波器、耦合器進行了設計和模擬，最後完成了一個頻率合成器。 -
In the process of selection about cpu, i compared several projects, and select the project of " mcu based risc technology " to research. the project apply the mpc555 chip of motorola company. and emphasize to research the application of spi and canbus. 4. as the part of the hardware platform, the i / o model block is researched, and some new hardware design and selfchecking measure applied in it
3 .在邏輯運算模塊中，對保護cpu提出了幾種方案進行了比較，本文採取了"基於risc （精簡指令集結構）技術的微處理器"方案進行研究，該方案採用的是motorola公司的mpc555晶元，並重點對spi （串列外圍介面）和canbus現場總線在硬體平臺中的應用進行了探討。 -
Chip - select input
切片選擇輸入 -
It is first thing to select dsp chip while design the hardware system
Dsp硬體系統的設計首先要進行dsp晶元的選擇。 -
This article combined controller " s hardware design, and explained how to select chip and explained chip " s function
本論文結合通信控制器的硬體設計，詳細說明晶元選擇的原因及其應用。 -
In order to design the instrument as simple as possible, we select the chip pci9050
為降低整個系統的開發難度，選用了plx公司出品的pci9050作為pci介面晶元。 -
Sc14404 is a chip optimized to dect handsets which is designed by us ns corp., and it has two cpu, co - processor is designed to deal with air data which can realize multi - timeslot format flexibly, select communication speed according to the customer ' s different need and bring convenience for the future upgrade
Sc14404是美國國家半導體公司設計的專用於dect手持機基帶處理器晶元，它存在兩個cpu ，其中的從cpu專用於處理dect協議的空中數據，這種方式可以靈活實現協議的多種時隙格式，為用戶的不同需求選擇不同的通信速率，也為以後的升級帶來便利。
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