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28069运行发热



我正在使用TMS320F28069PZT这款DSP,当配置在90MHz时,运行程序发热比较厉害,大概有60 ,70度,请问是什么原因,再问一下28069PZT和28069PZP这两种封装,pzp底部有散热,请问PZP是不是比PZT散热会好很多呢?