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比如它们CPU里的算术逻辑单元，累加器，桶形移位器，乘加器，CPU状态和控制寄存器等，它们的内部总线结构，存储器结构和一些外围设备的结构都一样吗，不一样的话做了哪些升级呢。刚学DSP，可能问的问题不太专业。万分感谢！
c54x是很老的器件，目前很少有客户在用。c6657是基于c66x内核，c66x内核是目前性能最好的DSP内核，c54x内核和c66x内核是不兼容的。具体可以看对应的CPU手册里的结构框图。http://www.ti.com/lit/ug/spru131g/spru131g.pdfhttp://www.ti.com/lit/ug/sprugh7/sprugh7.pdf
