【NUCLEO-L452RE测评】+2款开发板的对比
<div class='showpostmsg'><p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif"><span style="font-family:宋体">比较巧合的是在收到</span>NUCLEO-L452RE<span style="font-family:宋体">开发板之前,刚好参加活动得到了一块</span>STM32G431<span style="font-family:宋体">开发板,将两者放到一起后感到整体的差别不是很大,于是就想在性能等方面做一下比较。</span></span></span></p><p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif"><span style="font-family:宋体">若除去板上的标识,你能分辨出谁是谁吗?</span></span></span></p>
<p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif"><span style="font-family:宋体">图左侧的是我们的测评对象</span>NUCLEO-L452RE<span style="font-family:宋体">,而右侧的则是</span>STM32G431<span style="font-family:宋体">,两者在外形尺寸上几乎相差无几,从板上分隔线可以看出</span>NUCLEO-L452RE<span style="font-family:宋体">的调试器是可以从板卡上分离开单独使用的,而</span>STM32G431<span style="font-family:宋体">却不能。此外,两者使用的</span>USB<span style="font-family:宋体">接口也可以一目辨识出出品的先后。其实最主要的区别还是在调试器上,</span>NUCLEO-L452RE<span style="font-family:宋体">使用的是常规的</span>ST-LINK/2-1<span style="font-family:宋体">,而</span>STM32G431<span style="font-family:宋体">使用的则是</span>ST-LINK/V3<span style="font-family:宋体">,直观的区别就体现在调试器所用的芯片上,一大一小。</span></span></span></p>
<p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif"><span style="font-family:宋体">这也导致在开发环境的构建上也呈现出了差异,</span>STM32G431<span style="font-family:宋体">必须使用版本比较新的</span>KEIL<span style="font-family:宋体">,而</span>NUCLEO-L452RE<span style="font-family:宋体">的版本要求并不很高。</span></span></span></p>
<p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif"><span style="font-family:宋体">在开发板的布局方面,两者相差的则不是很大,两者的外设配置基本一致,且都支持</span>Arduino<span style="font-family:宋体">接口。</span></span></span></p>
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<p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif"><span style="font-size:12.0pt"><span style="background:white"><span style="font-family:"微软雅黑","sans-serif""><span style="color:#444444"><span style="letter-spacing:.75pt">开发板的外观</span></span></span></span></span></span></span></p>
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<p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif"><span style="font-family:宋体">在进行了外观的比较后,我们在从内核方面做一下比对:</span></span></span></p>
<p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif">1. STM32G431</span></span></p>
<p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif"><span lang="EN-US" style="color:red">STM32G4x1</span><span style="font-family:宋体">是</span> STM32G4 <span style="font-family:宋体">系列的入门级器件。内嵌运行频率为</span> <span lang="EN-US" style="color:red">170 MHz</span> <span style="font-family:宋体">的</span> Arm <span style="color:red">Cortex-M4</span><span style="font-family:宋体">内核(<span style="color:red">支持</span></span> FPU <span style="font-family:宋体">和</span> <span lang="EN-US" style="color:red">DSP </span><span style="font-family:宋体"><span style="color:red">指令</span></span><span style="font-family:宋体">)的混合信号微控制器。</span></span></span></p>
<p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif"><span style="font-family:宋体">该系列器件具有:</span></span></span></p>
<p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif">•2 <span style="font-family:宋体">个高速</span><span lang="EN-US" style="color:red">12 </span><span style="font-family:宋体"><span style="color:red">位</span></span><span lang="EN-US" style="color:red"> ADC</span><span style="font-family:宋体">(采样率</span> 4 M/<span style="font-family:宋体">秒)</span></span></span></p>
<p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif">•4 <span style="font-family:宋体">个</span> <span lang="EN-US" style="color:red">12 </span><span style="font-family:宋体"><span style="color:red">位</span></span><span lang="EN-US" style="color:red"> DAC</span><span style="font-family:宋体">(采样率</span> 15 M/<span style="font-family:宋体">秒)</span></span></span></p>
<p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif">•4 <span style="font-family:宋体">个高速比较器(</span>17 <span style="font-family:宋体">纳秒)</span></span></span></p>
<p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif">•3 <span style="font-family:宋体">个高速运放(具有可编程增益)</span></span></span></p>
<p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif">•ART<span style="font-family:宋体">、</span>CCM SRAM <span style="font-family:宋体">和数算加速器</span></span></span></p>
<p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif">•<span style="font-family:宋体">单存储区</span> Flash<span style="font-family:宋体">存储容量范围为</span> <span lang="EN-US" style="color:red">32</span> <span style="font-family:宋体">到</span> <span lang="EN-US" style="color:red">128 KB</span><span style="font-family:宋体">,封装为</span> 32 <span style="font-family:宋体">到</span> 100 <span style="font-family:宋体">引脚。</span></span></span></p>
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<p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif">2. STM32L452</span></span></p>
<p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif"><span lang="EN-US" style="color:red">STM32L4</span> 32 <span style="font-family:宋体">位</span> MCU+FPU <span style="font-family:宋体">是超低功耗微控制器,基于高性能的</span> ARM®Cortex®-M4 32 <span style="font-family:宋体">位</span> RISC <span style="font-family:宋体">内核,工作频率高达</span> <span lang="EN-US" style="color:red">80MHz</span><span style="font-family:宋体">。</span><span lang="EN-US" style="color:red">Cortex-M4</span> <span style="font-family:宋体">内核具有单浮点单元(</span>SFPU<span style="font-family:宋体">)精度,支持所有</span> ARM <span style="font-family:宋体">单精度数据处理指令与数据类型。同时执行<span style="color:red">全套</span></span><span lang="EN-US" style="color:red"> DSP </span><span style="font-family:宋体"><span style="color:red">指令</span></span><span style="font-family:宋体">和<span style="color:red">存储保护单元(</span></span><span lang="EN-US" style="color:red">MPU</span><span style="font-family:宋体"><span style="color:red">)</span></span><span style="font-family:宋体">,增强应用安全性。</span></span></span></p>
<p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif"><span style="font-family:宋体">该系列器件具有:</span></span></span></p>
<p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif">•<span style="color:red"> 16 </span><span style="font-family:宋体"><span style="color:red">位</span></span><span lang="EN-US" style="color:red"> ADC</span></span></span></p>
<p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif">•<span style="color:red">12 </span><span style="font-family:宋体"><span style="color:red">位</span></span><span lang="EN-US" style="color:red"> DAC</span></span></span></p>
<p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif">•<span style="font-family:宋体">单存储区</span> Flash<span style="font-family:宋体">存储容量高达</span> <span lang="EN-US" style="color:red">512 KB</span><span style="font-family:宋体">,有</span>100 <span style="font-family:宋体">引脚封装。</span></span></span></p>
<p style="text-align:justify"> </p>
<p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif"><span style="font-family:宋体">综上所述,两者虽然在内核上都是基于</span>Cortex-M4<span style="font-family:宋体">的,但两者却是各具千秋,其中</span>STM32G431<span style="font-family:宋体">在工作频率上以</span>170 MHz<span style="font-family:宋体">要高于</span>STM32L452<span style="font-family:宋体">的</span>80MHz<span style="font-family:宋体">,而</span>STM32L452<span style="font-family:宋体">以</span>512 KB <span style="font-family:宋体">的</span>Flash<span style="font-family:宋体">存储容量要高于</span>STM32G431<span style="font-family:宋体">的</span>128 KB<span style="font-family:宋体">。此外,</span>STM32L452<span style="font-family:宋体">还以</span>16 <span style="font-family:宋体">位</span> ADC<span style="font-family:宋体">高于</span>STM32G431<span style="font-family:宋体">的</span>12 <span style="font-family:宋体">位</span> ADC<span style="font-family:宋体">。</span></span></span></p>
<p style="text-align:justify"> </p>
<p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif"><span style="font-family:宋体">如果你要我说出个谁好谁差,那我只能告诉你,适用的才是最好的,具体的还是要看你设计的目标是什么,量才而用方使性价比最高!</span></span></span></p>
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专业PCB 发表于 2020-12-14 09:32
最适用的,才是最好的
<p>就是这个意思!</p>
<p>选型主要还是得看产品的需求,不过这种对比还是不错的!</p>
w494143467 发表于 2020-12-14 11:59
选型主要还是得看产品的需求,不过这种对比还是不错的!
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