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请教一下,TMS320C6455的DDR2在PCB布线的时候,是否每个数据byte内部(如DQ0-DQ7),在DDR颗粒端,可以任意换PIN,还是说换PIN的时候有什么限制。我这边是在byte内部随便换的。在资料里面没有任何地方说可以或不可以。我们一般都会换pin的,突然发现找不到TMS320C6455文档支撑了