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C5517 时钟咨询

Other Parts Discussed in Thread: TMS320C5517

 你好,我这里项目由C5515升级到C5517,用的是外部IIC ROOM启动, 现在发现C5517有几点变动:

1: C5517的BOOT,现在必须由GP[26:21]6个引脚配置,C5515不需要,配置时时钟以前选择的是RTC倍频,现在发现RTC倍频改为on-chip USB oscillator,请问

      on-chip USB oscillator 这个时钟是由外部提供还是内部自带的? 

2:项目没有使用EMIF ,那EM_WAIT2-EM_WAIT5是否可以悬空?

谢谢!

  • 1. on-chip USB oscillator时钟有外部12M晶体提供,请参考下面的数据手册说明。

    5.7.4.3.3.1 USB On-Chip Oscillator With External Crystal
    http://www.ti.com/lit/ds/symlink/tms320c5517.pdf 

    C5515到c5517的移植文档如下。
    http://www.ti.com/lit/an/sprabl8/sprabl8.pdf

    2.  EM_WAIT管脚内部有下拉电阻,可以悬空。