How to detect if DP83640 work well

I used TMS320DM642 combined with DP83640 to set up network ,But I don't know if DP83640 work well ,I have checked the power-supply  and the crystal,it doesn't have any problem, which PIN should I detect to judge the working condition  of DP83640.

Kailyn Chen：

Pin28 is the LED_link output, if you configure mode 1, this pin indicates the status of the LINK. The LED will be ON when Link is good.

In Mode 2 and Mode 3, this pin indicates transmit and receive activity in addition to the status of the Link. The LED will be ON when Link is good. It will blink when the transmitter or receiver is active.

WENWEI ZHU2：

回复 Kailyn Chen:

I have detect the mdio event using the function(CSLAPI uint MDIO_timerTick( Handle hMDIO ),it returns 3,that means No PHY connected.what problem do you think it can be?

thank you very much!

WENWEI ZHU2：

回复 Kailyn Chen:

I have already work out my problem,I didnot enable the interface of EMAC when reset the DSP , thanks very much,but I measure the voltage of PIN28(LINK),It is about 3.3V(It means the LED will on ),how can it be,shouldnot it be low voltage???