Hello, I have run into a problem with the TLK100 Ethernet chip. We have been using this chip for some time now with no problems at all until we tried to use the chip on a new board. Now we are seeing things that I cannot explain based upon the data sheet and even comparison between our working product and the new one. Specifically, the MII TX CLK and the MII RX CLK are mysteriously running at 5.0 Mhz instead of the 2.5Mhz that we have been used to seeing on the working product. The datasheet only says either 25Mhz or 2.5Mhz should be expressed by the TLK100 on these chips. There is no mention I can find of 5Mhz. I don't know if this means we are inexplicably in some sort of product test mode, or we have bad chips. The chips have the TLK100 part number on them, the TI logo, and the following 2 lines of text 3AT, and C4X4. One of our legacy products has the same part number and logo, but has 09T, D18K. I don't know if this tells me anything or not. Other symptoms of malfunction that I have on this board are the lack of link and activity indicators as occur on the working targets. I have checked that the 25Mhz oscillator is running, and the waveforms look the same on the scope as the working boards to include the 25Mhz output. Is there some way to put the chip in this odd state that can be corrected, or detected under code control?