RE: [ethmac] PHY

[xiayun@magima.com.cn]

I have chosen the Kendin's PHY KS8721B and I want to know whether 
this chip fit for the OPENCORE's ethernet IP.

----- Original Message ----- 
From: "Kevin Kay" <kevin.kay@e... > 
To: <ethmac@o... > 
Date: Tue, 24 Sep 2002 18:49:16 -0400 
Subject: RE: [ethmac] PHY 

> 
> 
> It really depends upon what you want to do and what your 
> application is 
> (copper, fiber, 10/100/1000, auto-negotiation, auto-MDIX, status 
> counters, 
> etc.). 
> 
> There are some really low-cost PHYs out there.  Also, if your 
> application is 
> a PCI application, that would put you in a different PHY market.  
> If you 
> need extended cable range, that would put you in another market.  
> Are you 
> doing an MII, RMII, SMII interface to the PHY? 
> 
> For a basic, no frills, low cost, MII to copper 10/100 
> autonegotiated PHY, I 
> like the Altima AC101L (they are now Broadcom).  This PHY will also 
> drive a 
> fiber transceiver.  If you're on a PCI application, a RealTek PHY 
> is tough 
> to beat on price.  If you want some of the higher-end functions 
> (auto-MDIX, 
> auto polarity correction, etc.) then you're in a different class of 
> PHYs 
> (like the Broadcom 5221 and derivatives).  Finally, there's the old 
> standby 
> Intel (formerly from Level One) 97x parts.  I think Kendin also 
> makes a PHY 
> family (it's been a while since I've looked at them, so please 
> excuse me if 
> I'm off on Kendin's product offering). 
> 
> All of the above can be configured to a default state that is 
> usable.  IMHO, 
> I think your driving factors will be the specific features of your 
> application, your available supply voltages vs. the PHY's 
> requirements, and 
> price (if you're cost sensitive). 
> 
> Regards, 
> Kevin Kay 
> 
> > -----Original Message----- 
> > From: owner-ethmac@o...  
> [mailto:owner-ethmac@o... ]On 
> > Behalf Of Wilson Roger 
> > Sent: Tuesday, September 24, 2002 12:21 PM 
> > To: Open Cores - Ethernet (E-mail) 
> > Subject: [ethmac] PHY 
> > 
> > 
> > Can anyone recommend a PHY that they've found easy and 
> effective to use? 
> > 
> > Thanks. 
> > 
> > Roger. 
> > 
> > 
> > 
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> 
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