| 来源： csdn 作者：hdfanny 原文链接：https://blog.csdn.net/weixin_44116888/article/details/124302785?spm=1001.2014.3001.5502 |
缺芯问题看来还得持续一段时间，身边很多工程师会因为价格、项目成本、供应链安全等问题，纷纷寻找国产替代。在网上找了很多资料，想看看一些国内大厂怎么选择国产芯进行替代。
上面两张图都是找到的关于华为FreeBuds Pro的拆解图，左图是来自我爱音频，主芯片ST的STM32F411xE芯片，右图来自与非网，主芯片是国民技术的N32G4FRxE。在好奇心驱使下，我整理了一下两个料号的主要参数对比。
| | N32G4FRxE | |
| 主频 | ARM Cortex-M4F@144MHz，180DMIPS 0等待执行程序 | ARM Cortex-M4F@100MHz，126DMIPS 0等待执行程序 |
| Flash | 512K | 512K |
| SRAM | 144K | 128K |
| 工作环境 | 1.8V-3.6V/-40℃~105℃ | 1.7V-3.6V/-40℃~85℃/105℃/125℃ |
| 功耗 | Standy模式： <2uA Run模式:90uA/MHz | Standy <2uA Run模式:100uA/MHz |
| ADC | 2*12bit 5Msps ,最多支持16路 | 1*12bit 2.4Msps，最多支持16路 |
从参数对比看，国民技术的N32G4FR主要性能要优于ST的STM32F411xE，同样用的ARM Cortex-M4F内核，N32G4FR最高工作主频能到144MHz，性能更高；在Run模式下，功耗是90uA/MHz，相较于ST的100uA/MHz也更低。另外，N32G4FR有2个ADC，比STM32F411多一个，而且ADC在性能上更优，达到5Msps，所以整体来说，国民技术的这颗N32G4FR更优。
深入了解发现，国民技术的N32系列MCU除了与华为有深入的合作，大疆、宁德时代、石头科技、加西贝拉等等都是他家的合作伙伴，这些都是工业、能源、家电等领域的标杆企业。
既然能经得起大厂认证，说明除了产品性价比上的优势，在量产服务、供货能力等方面也应该是经得住考验的。在网上扒了一份比较详细的国民技术N32系列MCU替换ST芯片对照表，大家可以看看，各取所需。
| 产品系列 | 产品型号 | 可替换型号 | 封装 | |
| N32G452 | N32G452CBL7 | STM32F101CBT6 STM32F103CBT6 | LQFP48 | |
| N32G452RBL7 | STM32F101RBT6 STM32F103RBT6 STM32F105RBT6 STM32F205RBT6 STM32F401RBT6 STM32F410RBT6 | LQFP64 | ||
| N32G452RCL7 | STM32F101RCR6 STM32F103RCT6 STM32F105RCT6 STM32F205RCT6 STM32F401RCT6 STM32F411RCT6 STM32F446RCT6 | LQFP64 | ||
| N32G452REL7 | STM32F101RDT6 STM32F101RET6 ST32F103RDT6 STM32F103RET6 STM32F205RET6 STM32F215RET6 STM32F401RDT6 STM32F401RET6 STM32F411RET6 STM32F446RET6 | LQFP64 | ||
| N32G452VCL7 | STM32F101VCT6 STM32F103VCT6 STM32F105VCT6 STM32F205VBT6 STM32F205VCT6 STM32F401VBT6 STM32F401VCT6 STM32F411VCT6 STM32F446VCT6 | LQFP100 | ||
| N32G452VEL7 | STM32F101VDT6 STM32F101VET6 STM32F103VDT6 STM32F103VET6 STM32F205VET6 STM32F215VET6 STM32F401VDT6 STM32F401VET6 STM32F411VET6 STM32F446VET6 | LQFP100 | ||
| N32G455 | N32G455CBL7 | STM32F302CBT6 STM32F303CBT6 STM32F373CBT6 | LQFP48 | |
| N32G455CCL7 | STM32F302CCT6 STM32F303CCT6 STM32F373CCT6 | LQFP48 | ||
| N32G455RBL7 | STM32F302RBT6 STM32F303RBT6 STM32F373RBT6 | LQFP64 | ||
| N32G455RCL7 | STM32F302RCT6 STM32F303RCT6 STM32F373RCT6 | LQFP64 | ||
| N32G455REL7 | STM32F302RDT6 STM32F302RET6 STM32F303RDT6 STM32F303RET6 | LQFP64 | ||
| N32G455VBL7 | STM32F302VBT6 STM32F303VBT6 STM32F373VBT6 | LQFP100 | ||
| N32G455VCL7 | STM32F302VCT6 STM32F303VCT6 STM32F373VCT6 | LQFP100 | ||
| N32G455VEL7 | STM32F302VDT6 STM32F302VET6 STM32F303VDT6 STM32F303VET6 | LQFP100 | ||
| N32G457 | N32G457RCL7 | STM32F107RBT6 STM32F107RCT6 | LQFP64 | |
| N32G457VCL7 | STM32F107VBT6 STM32F107VCT6 STM32F207VCT6 | LQFP100 | ||
| N32G457VEL7 | STM32F207VET6 STM32F217VET6 STM32F407VET6 STM32F417VET6 | LQFP100 | ||
| N32G432 | N32G432K8L7 | STM32F042K4T6 STM32F042K6T6 | LQFP32 | |
| N32G432KBL7 | STM32G070KBT6 | LQFP32 | ||
| N32G432C8L7 | STM32F101C8T6 STM32F102C8T6 STM32F103C8T6 | LQFP48 | ||
| N32G432CBL7 | STM32G070CBT6 STM32F070CBT6 STM32F101CBT6 STM32F102CBT6 STM32F103CBT6 | LQFP48 | ||
| N32G432R8L7 | STM32F101R4T6 STM32F101R6T6 STM32F101R8T6 STM32F102R4T6 STM32F102R6T6 STM32F102R8T6 STM32F103R4T6 STM32F103R6T6 STM32F103R8T6 | LQFP64 | ||
| N32G432RBL7 | STM32G070RBT6 STM32F070RBT6 STM32F101RBT6 STM32F102RBT6 STM32F103RBT6 | LQFP64 | ||
| N32G435 | N32G435K8L7 | STM32G071K8T6 STM32F303K8T6 | LQFP32 | |
| N32G435C8L7 | STM32G071C8T6 STM32F072C8T6 STM32F301C8T6 STM32F302C8T6 STM32F303C8T6 STM32F373C8T6 | LQFP48 | ||
| N32G435CBL7 | STM32G071CBT6 STM32G081CBT6 STM32F071CBT6 STM32F072CBT6 STM32F091CBT6 STM32F302CBT6 STM32F303CBT6 STM32F373CBT6 | LQFP48 | ||
| N32G435R8L7 | STM32G071R8T6 STM32F072R8T6 STM32F301R6T6 STM32F301R8T6 STM32F302R6T6 STM32F302R8T6 STM32F303R6T6 STM32F303R8T6 STM32F373R8T6 | LQFP64 | ||
| N32G435RBL7 | STM32G071RBT6 STM32G081RBT6 STM32F071RBT6 STM32F072RBT6 STM32F091RBT6 STM32F302RBT6 STM32F303RBT6 STM32F373RBT6 | LQFP64 | ||
| N32L43x | N32L433K8L7 | STM32L010K8T6 STM32L051K8T6 STM32L052K8T6 STM32L062K8T6 | LQFP32 | |
| N32L433KBL7 | STM32L071KBT6 STM32L072KBT6 STM32L082KBT6 | LQFP32 | ||
| N32L436C8L7 | STM32L071C8T6 STM32L051C8T6 STM32L052C8T6 STM32L053C8T6 STM32L063C8T6 STM32L151C8T6-A STM32L152C8T6-A | LQFP48 | ||
| N32L436CBL7 | STM32L071CBT6 STM32L072CBT6 STM32L073CBT6 STM32L081CBT6 STM32L083CBT6 STM32L151CBT6-A STM32L152CBT6-A | LQFP48 | ||
| N32L436R8L7 | STM32L010R8T6 STM32L051R8T6 STM32L052R8T6 STM32L053R8T6 STM32L063R8T6 STM32L100R8T6-A STM32L151R8T6-A STM32L152R8T6-A | LQFP64 | ||
| N32L436RBL7 | STM32L010RBT6 STM32L071RBT6 STM32L072RBT6 STM32L073RBT6 STM32L083RBT6 STM32L100RBT6-A STM32L151RBT6-A STM32L152RBT6-A | LQFP64 | ||
| N32L406CBL7 | STM32L053C6T6 STM32L053C8T6 STM32L063C8T6 STM32L073CBT6 STM32L083CBT6 无LCD： STM32L071CBT6 STM32L072CBT6 STM32L081CBT6 STM32L151CBT6-A STM32L152CBT6-A | LQFP48 | ||
| N32L406RBL7 | STM32L053R6T6 STM32L053R8T6 STM32L063R8T6 STM32L073RBT6 STM32L083RBT6 无LCD： STM32L010RBT6 STM32L071RBT6 STM32L072RBT6 STM32L100RBT6-A STM32L151RBT6-A STM32L152RBT6-A | LQFP64 | ||
| N32G032 | N32G032F6U7 | STM32L011F4U6 | UFQFPN20 | |
| N32G032F6S7 | STM32L011F4P6 STM32F030F4/6P6 STM32F031F4/6P6 | TSSOP20 | ||
| N32G032P6W7 | STM32L011E4Y6 | WLCSP25 | ||
| N32G032K6Q7 | STM32F031K4/6U6 | QFN32 | ||
| N32G032K6L7 | STM32F030K4/6T6 STM32F031K4/6T6 | LQFP32 | ||
| N32G032C8L7 | STM32F030C8T6 STM32F031C6T6 | LQFP48 | ||
| N32G032R8L7 | STM32F030R8T6 | LQFP64 |
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