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電子書(shū)-RTL Design Style Guide for Verilog HDL540頁(yè)A FF having a fixed input value is generated from the description in the upper portion of
Example 2-21. In this case, ’0’ is output when the reset signal is asynchronously input,
and ’1’ is output when the START signal rises. Therefore, the FF data input is fixed at
the power supply, since the typical value ’1’ is output following the rise of the START
signal.
When FF input values are fixed, the fixed inputs become untestable and the fault detection rate drops. When implementing a scan design and converting to a scan FF, the scan
may not be executed properl not be executed properly, so such descriptions , so such descriptions are not are not recommended. recommended.[1] As in the lower
part of Example 2-21, be sure to construct a synchronous type of circuit and ensure that
the clock signal is input to the clock pin of the FF.
Other than the sample shown in Example 2-21, there are situations where for certain
control signals, those that had been switched due to the conditions of an external input
will no longer need to be switched, leaving only a FF. If logic exists in a lower level and a
fixed value is input from an upper level, the input value of the FF may also end up being
fixed as the result of optimization with logic synthesis tools. In a situation like this, while
perhaps difficult to completely eliminate, the problem should be avoided as much as possible.
標(biāo)簽：
RTL
verilog hdl
上傳時(shí)間：
2022-03-21
上傳用戶：canderile
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對(duì)某四輪獨(dú)立驅(qū)動(dòng)電動(dòng)汽車(chē)輪轂電機(jī)進(jìn)行研究,設(shè)計(jì)一種永磁無(wú)刷直流電機(jī)控制器.以STM32F103RBT6芯片為基礎(chǔ),對(duì)電機(jī)驅(qū)動(dòng)電路、采樣電路和保護(hù)電路分別進(jìn)行硬件設(shè)計(jì)與分析;同時(shí),采用模塊化軟件設(shè)計(jì)方案,對(duì)該控制器的軟件系統(tǒng)進(jìn)行升級(jí).實(shí)驗(yàn)驗(yàn)證表明:所設(shè)計(jì)的電機(jī)控制器能使電機(jī)響應(yīng)迅速、轉(zhuǎn)速穩(wěn)定、無(wú)超調(diào),且電動(dòng)車(chē)動(dòng)力輸出性能良好.A permanent magnet brushless direct current motor controller was designed by studying the hub motor of a four-wheel independent drive electric vehicle.Based on STM32 F103RBT6 chip,the hardware design and analysis of motor drive circuit,sampling circuit and protection circuit were carried out respectively.At the same time,modular software design scheme was adopted to upgrade the software system of the controller.Experimental results show that the designed motor controller can ensure the motor fast response,stable speed,no overshoot,and good power output performances.
標(biāo)簽：
電動(dòng)汽車(chē)
永磁無(wú)刷直流電機(jī)
上傳時(shí)間：
2022-03-26
上傳用戶：qingfengchizhu
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為設(shè)計(jì)高效率、低損耗的PFC電路,本文基于UCC28019進(jìn)行電路設(shè)計(jì)。以UCC28019輸出的PWM波形來(lái)控制Boost升壓斬波為核心電路,使電路中的電容交替地充放電、電感交替的儲(chǔ)存和釋放能量,最后實(shí)現(xiàn)在輸入AC20V~24V電壓情況下穩(wěn)定輸出DC38V。測(cè)試結(jié)果表明,系統(tǒng)實(shí)現(xiàn)效率為95%左右,電壓調(diào)整率小于1%,電源功率因數(shù)0.99。交流輸入電壓為19.0-25.8 V時(shí),輸出直流電壓穩(wěn)定性較好,電感無(wú)明顯嘯叫且紋波小,具有一定的帶負(fù)載能力和實(shí)用性。In order to design the PFC circuit with high efficiency and low loss,this paper designs the circuit based on UCC28019.The PWM waveform output by UCC28019 is used to control boost chopper as the core circuit,which alternately charges and discharges capacitors,stores and releases energy by inductors,and finally achieves stable output of DC38 V under the input voltage of AC20 V~24 V.The test results show that the system achieves about 95% efficiency,the voltage adjustment rate is less than 1%,the power factor is 0.99,and the AC input voltage is 19.0-25.8 V.The output DC voltage stability is good,the inductance has no obvious whistle and the ripple is small,so it has certain load capacity and practicability.
標(biāo)簽：
ucc28019
pfc
電路設(shè)計(jì)
上傳時(shí)間：
2022-04-03
上傳用戶：
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The GL823K integrates a high speed 8051 microprocessor and a high efficiency hardware engine for the best data transfer performance between USB and flash card interfaces. Its pin assignment design fits to card sockets to provide easier PCB layout. Inside the chip, it integrates 5V to 3.3V regulator, 3.3V to 1.8V regulator and power MOSFETs and it enables the function of on-chip clock source (OCCS) which means no external 12MHz XTAL is needed and that effectively reduces the total BOM cost.
標(biāo)簽：
GL823K
SCH
上傳時(shí)間：
2022-04-27
上傳用戶：qdxqdxqdxqdx
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DescriptionThe IMX385LQR-C is a diagonal 8.35 mm (Type 1/2) CMOS active pixel type solid-state image sensor with a squarepixel array and 2.13 M effective pixels. This chip operates with analog 3.3 V, digital 1.2 V, and interface 1.8 V triplepower supply, and has low power consumption. High sensitivity, low dark current and no smear are achieved throughthe adoption of R, G and B primary color mosaic filters. This chip features an electronic shutter with variablecharge-integration time.(Applications: Surveillance cameras)
標(biāo)簽：
CMOS傳感器
IMX385LQR-C
上傳時(shí)間：
2022-06-18
上傳用戶：
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sony CMOS傳感器datasheet，IMX178LQJ-C_Data_SheetDescriptionThe IMX178LQJ-C is a diagonal 8.92 mm (Type 1/1.8) CMOS active pixel type image sensor with a square pixelarray and 6.44 M effective pixels. This chip operates with analog 2.9 V, digital 1.2 V and interface 1.8 V triple powersupply, and has low power consumption.High sensitivity, low dark current and no smear are achieved through the adoption of R, G and B primary colormosaic filters.This chip features an electronic shutter with variable charge-integration time.(Applications: Surveillance cameras, FA cameras, Industrial cameras)
標(biāo)簽：
CMOS傳感器
IMX178LQJ-C
上傳時(shí)間：
2022-06-18
上傳用戶：
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This example shows how you can use signal functions in the Visiondebugger to simulate a signal that is coming into one of the analog inputs of the LPC21xx.The Measure example is described in detail in the Getting StartedUser's Guide.The MEASURE example program is available for several targets:Simulator: uVision Simulator for LPC2129MCB2100: Keil MCB2100 evaluation board with ULINK debugger - Application is loaded to internal Flash. - Switch S2 (INT1) is used as GPIO and sampled (jumper positions: J1= off, J7= on) - potentiometer POT1 is sampled as AIN0 (jumper position: J2= on) - serial port COM1 parameters: 9600 baud, no parity, 8-bits, 1 stop bit, flow control noneMCB2130: Keil MCB2130 evaluation board with ULINK debugger - Application is loaded to internal Flash. - Switch S2 (INT1) is used as GPIO and sampled (jumper positions: J1= off, J7= on) - potentiometer POT1 is sampled as AIN1 (jumper position: J2= on) - serial port COM1 parameters: 9600 baud, no parity, 8-bits, 1 stop bit, flow control none
標(biāo)簽：
dac8568
上傳時(shí)間：
2022-06-28
上傳用戶：
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一、建焊盤(pán)打開(kāi)建立焊盤(pán)的軟件Pad Designer路徑：包括采用的制式，現(xiàn)在選公制單位毫米，精度3，右側(cè)問(wèn)是否需要多重鉆孔，這個(gè)功能一般是用于做非圓孔。一般圓孔不用勾選。下面設(shè)定鉆孔樣式，一般是圓孔，鉆孔內(nèi)部是否鍍銅 plated（no plated即為不鍍銅，一般用于塑膠件定位孔），再是鉆孔直徑，設(shè)置精度，是否偏移等。如果是表貼元件，鉆孔直徑設(shè)為0。如果是表面安裝元件，把signle layer mode勾選。焊盤(pán)一般需要 begin layer和end layer，還有就是soldmask_top，soldmask_bottom，pastemask top，pastemask bottom這幾個(gè)層面。對(duì)表面安裝元件來(lái)說(shuō)，只需要begin layer，soldermask_top以及pastemask_top就可以了。鼠標(biāo)左鍵點(diǎn)擊begin layer，會(huì)發(fā)現(xiàn)最下面三個(gè)對(duì)話框被刷新，在下面填入需要的值：從左到右：規(guī)則焊盤(pán)，熱焊盤(pán)，反焊盤(pán)。1規(guī)則焊盤(pán)下面需要填入焊盤(pán)形狀，長(zhǎng)寬，是否有偏移。1熱焊盤(pán)，要求選擇焊盤(pán)類(lèi)型，尺寸等；1反焊盤(pán)，作用是設(shè)定焊盤(pán)與周邊間距，一般比規(guī)則焊盤(pán)略大6-10mil。鼠標(biāo)點(diǎn)擊soldermask_top，下面對(duì)話框刷新出該選項(xiàng)。按照需要填入數(shù)據(jù)。Pastemask top同樣處理。右邊上角還有視圖角度選擇，Xsection為水平視圖，TOP為從上往下看。
標(biāo)簽：
cadence allegro
上傳時(shí)間：
2022-07-02
上傳用戶：XuVshu
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最新正版solidworks2017安裝教程目前，solidworks最新版本是solidworks2017，功能齊全，操作簡(jiǎn)便。下面，為大家介紹一下solidworks2017安裝教程。安裝步驟：1.斷開(kāi)電腦網(wǎng)絡(luò)，鼠標(biāo)右擊SolidWorks.2017.Activator-SSQ，進(jìn)行解壓2.打開(kāi)解壓之后的文件夾，鼠標(biāo)右擊SW.Activator，選擇以管理員的身份運(yùn)行3.首先點(diǎn)擊左側(cè)的 set serial numbers然后右側(cè)選擇 force local activation serial numbers，最后點(diǎn)擊 accept serial numbers4.點(diǎn)擊Yes后，繼續(xù)點(diǎn)擊OK5.再點(diǎn)擊左邊的“Activate Licenses”，確認(rèn)Status項(xiàng)中的值都是“Activate”，然后點(diǎn)擊“Activate Licenses”，彈出窗口點(diǎn)擊“NO
標(biāo)簽：
solidworks
上傳時(shí)間：
2022-07-03
上傳用戶：
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Simulation can provide a lot of information about what the system is doing. We canadd the effect of different element, like Encoder resolution, ADC sampling rate, etc and understand how does it affect the system. Another benefit is the possibility to slow down the process, to gain insight on what happens of fast systems or, vice versa, speed up slow process.Because National Instruments is a unique company in the fact the we provide a fullhardware solution couple with a full development platform, we can use this tools in very particular ways For example, it is possible to combine the LabVIEW Control Design and Simulation Module along with the FPGA module to quickly prototype a controller. One of the main benefits of this approach is that there is no need to compile the FPGA code, which allows for a quick algorithm design turnaround and debugging.
標(biāo)簽：
pid控制
上傳時(shí)間：
2022-07-20
上傳用戶：
