基本上盡量讓兩層訊號線中間可以用ground或power隔開
這樣可以避免訊號線的互相干擾
2008年11月24日 星期一
2008年9月18日 星期四
The differnce comparison table of WM5 and WM6 by MS.
Here comes a difference comparison table
Click here to get it. (Badongo)
Click here to get it. (Badongo)
2008年8月27日 星期三
How to replace DM9161 series.
There are some difference between each version of DM9161 series.
CLick here to download explain documents (Badongo)
CLick here to download explain documents (Badongo)
2008年3月20日 星期四
Difference between RMII V1.0/V1.2
According to the application note of National Semiconductor, AN-1405, the difference is listed below.
RMII Spec. Revision 1.2
CRS_DV will toggle at the end of a packet to indicate deassertion of CRS.
RMII Spec. revision 1.0
CRS_DV will remain asserted until final data is transferred. CRS_DV will not toggle at the end of a packet.
RMII Spec. Revision 1.2
CRS_DV will toggle at the end of a packet to indicate deassertion of CRS.
RMII Spec. revision 1.0
CRS_DV will remain asserted until final data is transferred. CRS_DV will not toggle at the end of a packet.
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