snowing

2 things I don't like:
1) No USB 3.0
2) No integrated LAN PHY

trentcys

原帖由 snowing 於 2008-10-21 22:26 發表
2 things I don't like:
1) No USB 3.0
2) No integrated LAN PHY

外置PHY應該唔關chipset成本事, 反而似係同signaling有關.
底板設計會將PHY & transformer放o係RJ45 port附近, 照計係用黎減低扞擾.

Some reference:
http://electronicdesign.com/Files/29/9177/9177_01.pdf

What’s so hard about putting an Ethernet PHY on the same chip as the MAC?
The PHY incorporates a significant amount of analog hardware, while the MAC is typically an all digital component. The chip footprint and the mixed analog/digital architecture are why MACs were first incorporated in microcontrollers, leaving the PHY off-chip.More flexible, higher-density chip technology has allowed both the MAC and PHY to reside on the
same chip.

Are external components other than the RJ-45 jack still required?
Yes. The PHY provides most of the analog support, but the typical implementation still requires a half-dozen discretes and a local area network magnetics isolation module. The latter is typically a 1:1 ratio transformer. These primarily protect the PHY from electrical abuse.

gas3000

看來還是正經買intel LAN卡比較好

kwanchu2006

姐係無內置INTEL LAG用