原创国产芯不知道怎么选？可以试试N32替代STM32

 2022-4-24 15:16  1815 8 8 分类: MCU/ 嵌入式

缺芯问题还得持续一段时间，身边很多工程师会因为价格、项目成本等问题，不得已需要国替，我也不例外。为了降低试错成本，我上网找了很多资料，想看看国产芯有没有被大厂替代使用过的，一来在性价比方面肯定是有优势，二来兼容性、开发生态和供货问题上肯定不会有大问题。

上面两张图是我找到关于华为freebudspro耳机盒的拆解图，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，我整了一下两个料号的主要参数对比，解开华为用这款N32芯片的答案。

	N32G4FRxE	STM32F411xE
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	512	512
SRAM	144	128
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各方面都优于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。所以整体性价比来说，华为会选择国民技术的N32G4FR也是情理之中。

据悉国民技术的N32系列MCU除了在消费电子领域和华为、大疆等大客户有合作，在电机控制、汽车电子、智能家电、智能表计、能源管理、物联网等领域都得到了很好的批量应用，像宁德时代、戴尔、微软都是他的合作伙伴。

既然能经得起大厂认证，说明除了性价比上的优势，在兼容问题、生态环境、供货能力等方面也是经得住考验的。我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
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