本帖最后由 icecut 于 2010-11-25 11:48 编辑
Edge rate control. Logic “1” operates
at edge rates for “full speed”. Logic
“0” operates edge rates for “low
speed”.
这里的logic 1,是指speed引脚的逻辑还是usb总线d+-的逻辑
=============================
问题解决了.原因是那个ip core里有个note.说nxp的speed是反的.......
shit.
======================================
送十分给 |