電子書-RTL Design Style Guide for Verilog HDL540頁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
在傳統(tǒng)智能小車驅(qū)動(dòng)電路設(shè)計(jì)中,較多考慮使用直流電機(jī)還是步進(jìn)電機(jī),電機(jī)功率、能耗等性能參數(shù)。使用具有armCortexM4內(nèi)核的STM32嵌入式平臺(tái)控制四輪的4個(gè)直流電機(jī)。文章基于PWM技術(shù)及PID算法,對四輪進(jìn)行精準(zhǔn)地速度、轉(zhuǎn)向及啟停控制,實(shí)驗(yàn)表明此小車具有優(yōu)越各種地形適應(yīng)能力。In the traditional intelligent car drive circuit design,DC motor or stepping motor,motor power,energy consumption and other performance parameters are considered.The four DC motors with four wheels are controlled by STM32 embedded platform with arm Cortex M4 kernel.Based on the PWM technology and PID algorithm,the accurate ground speed,steering,and start-stop control of the four wheels are carried out.The experiment shows that the vehicle has the superior adaptability to all kinds of terrains.
標(biāo)簽：
stm32
智能小車
控制系統(tǒng)
上傳時(shí)間：
2022-04-02
上傳用戶：
隨著電磁閥在工業(yè)和日常應(yīng)用的增多,其功耗越來越被人們所重視。通過對電磁閥驅(qū)動(dòng)電路的研究,設(shè)計(jì)一套電磁閥節(jié)能驅(qū)動(dòng)電路。不僅提高了電磁閥的響應(yīng)時(shí)間,更重要的是降低了功耗,使電磁閥由工作在大電流狀態(tài)下,變成大電流啟動(dòng)小電流維持的工作狀態(tài)。減少了由電流過大引起的電磁閥線圈過熱,增加了電磁閥的安全性。The power consumption of an electromagnetic valve is drawing increasingly more attentiori as it is widely used in industrial production and daily life. In this study, an energy - saving driving circuit of electromagnetic valves was designed. It can make an electromagnetic valve to start with a high current while work with a low current; thereby the power consumption can be reduced. Besides, it can shorten the response time of an electromagnetic valve and improve the security of the valve.
標(biāo)簽：
電磁閥
節(jié)能驅(qū)動(dòng)電路
上傳時(shí)間：
2022-04-16
上傳用戶：
