看完手册对这款芯片的应用还是有点不太理解,该PHY芯片需要软件配置么?还是只要硬件配置就可以了?我看手册里说该芯片有寄存器组,并且还提到了软件复位,是什么意思?请帮忙解惑,谢谢
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软件reset指的是通过配置寄存器0x00 bit15=1来实现内部控制寄存器恢复到初始状态默认寄存器的值。
谢谢,还要请教一下,
The output of the clock signal requires termination consideration.
The termination requirement depends on the trace
length of the clock signal. No series or load termination is
required for short traces less than 3 inches.
有关时钟的这部分没有太明白,能不能麻烦您帮我解惑一下,谢谢
这部分讨论的是时钟的PCB走线,一般来说,时钟走线都尽量短,尽量靠近芯片端,这里面也提到了如果在3inch之内,就不需要接终端匹配,走线太长的话,需要考虑信号反射带来的传输不连续,需要接终端匹配电阻。