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chaoqiang jiang 您好，
给您提供一个关于两者对比以及移植的文档《Migrating From MSP430F541x/F543x to MSP430F541xA/F543xA》
www.ti.com/.../slaa419b.pdf
5438A是对5438的升级，5438中PMM模块在低电压的时候对flash读写有问题。两者的核有一定区别，所以建议按照鸵鸟蝈蝈所述，两个芯片对应的代码是有所区别的
