在选型向导上说3354不包含PRU-ICSS模块，不支持IEEE1588v2，如下图所示：
但是在wiki中有这段话：
Note : PTP-1588 is also available on all existing Sitara devices on CPSW (The ethernet MAC on a Beaglebone) through a module known as CPTS (Common Platform Time switch) which is a hardware IP. CPSW is a gigabit switch which supports PTP 1588 v2. It's features are documented in all the respective Sitara TRM's. This wiki does not cover that aspect. Please do a comparison of both the IP's based on your requirements.
这段话的意思好像是说在所有的am335x的处理器都支持IEEE1588v2的协议，只是实现的方式不同，am3351/3352/3354在CPSW里，AM3356/3357/3358/3359除了在CPSW里,还在PRU-ICSS模块里有IEEE1588v2协议？
另外从处理器的内部框图看，好像也是wiki中这段话的意思：
现在弄不清楚AM3354到底是否支持IEEE1588了，还请各位专家解惑。
