Jonathan Whyatt

KSZ8041 PHY with K60

Discussion created by Jonathan Whyatt on Apr 9, 2013
Latest reply on Jun 28, 2020 by zhang ha

I am using the Micrel KSZ8041NL PHY with a K60 tower based custom board.

The PHY schematic matches that of the development boards.

We are finding that with some boards we cant get onto the network when we connect it (via switch or directly to main router). On these boards the link light on the ethernet socket is on as expected but the activity light flashes constantly at around 6Hz (and not with the network activity as I would expect).

Looking at packet capture when connecting by cable via my laptop (shared internet connection) I see dhcp discover packets coming from the board but dhcp offers from the router seem to be ignored.


Is anyone else seeing this same or similar issue or have any ideas as to what might be the cause?



Didnt get to the bottom, nor could micrel after sending our boards to micrel's labs.


For anyones that interested, we got round it by modifying mqx's phy drivers to renegotiate the link speed to 10mbps which was required for the project and found that at 10mbps the problem disappeared.


If anyone else sees this problem let me know as I would like to get the bottom of it either way!


Message was edited by: Jonathan Whyatt