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
上傳時間：
2022-03-21
上傳用戶：canderile
為解決移相全橋電路驅(qū)動及相角控制問題,設(shè)計了一種數(shù)字控制的移相全橋驅(qū)動電路.以TPL521為光耦隔離、IR2110為柵極驅(qū)動芯片.由DSP產(chǎn)生PWM信號,經(jīng)過光耦隔離和邏輯電路后送至IR2110進(jìn)行相角控制.文章對IR2110驅(qū)動電路原理進(jìn)行分析及參數(shù)進(jìn)行設(shè)計,對TMS320F28335進(jìn)行設(shè)置并給出部分代碼.實(shí)驗結(jié)果表明：通過TMS320F28335可產(chǎn)生的不同相角的PWM波形,滿足了移相全橋?qū)Σ煌嘟强刂频囊?In order to solve the problem of phase-shifted full-bridge circuit driving and phase angle control,a digitally controlled phaseshifted full-bridge driving circuit was designed. TPL521 optocoupler isolation,IR2110 gate driver chip. PWM signals are generated by the DSP and sent to the IR2110 for phase angle control after optocoupler isolation and logic circuits. This text carries on the analysis to the principle of IR2110 drive circuit and parameter design,set up and give out some code to TMS320F28335. The experimental results show that the PWM waveforms with different phase angles generated by TMS320F28335 can meet the requirements of phase-shifted full-bridge control for different phase angles.
標(biāo)簽：
dsp28335
ir2110
芯片
上傳時間：
2022-05-03
上傳用戶：zhanglei193
