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TMS320C6652: 启动时序

Part Number: TMS320C6652

你好,

TMS320C6652数据手册6.3.1.1中上电时序,其中CVDD对SYSCLK/DDRCLK时间间隙2b描述为“Once CVDD is valid, the clock drivers should be enabled. Although the clock inputs are not necessary at this time, they should either be driven with a valid clock or be held in a static state with one leg high and one leg low.” 这句话的意思是如果差分输入脚不能一个高一个低的话,时钟就必须在CVDD之前起来吗?因为时钟电源一般比CVDD高,在时钟电源没有起来之前,很难确保时钟起振或者保证管脚一个高一个低。如果时钟可以在CVDD之后起振,这个时间间隔要求是多少?

谢谢