嵌入式系统内存有关问题

嵌入式系统内存问题
哪位大哥跟跟我讲讲嵌入式系统（PXA 270 320等等一些手机的CPU）为什么内存都是那么小，这跟CPU有什么关系？

------解决方案--------------------------------------------------------
The size of the system memory is affected by many factors: 

(1) Cost. You system will carry less memory if the final product is cost sensitive

(2) Latency and Density. The bigger the memory size, the longer it takes to index the memory cell. And SRAM has low latency, but low density as well. DRAM has longer latency, but higher density. 


------解决方案--------------------------------------------------------

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The size of the system memory is affected by many factors:

(1) Cost. You system will carry less memory if the final product is cost sensitive

(2) Latency and Density. The bigger the memory size……