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Part Number: TLK105
My TLK105 is designed to receive data only. I found sometimes after power up, MAC interface didn't output data. I checked by oscilloscope, there was signal on 100Mbs PMD Interface, but no signal was on MAC interface.
When I used this board to transmit data only, the communication was always fine.
I didn't configure the register, so TLK105 is in default mode. I have checked the hardware configuration, no problem is found.
Could recommend steps to locate and solve this issue? Or, which register I can have a try?
EFL (Ethernet & FPD Link) Applications Engineer
In reply to Rob Rodrigues:
In reply to Di Wang1:
I found something in 0x0010. The Bit 4 always showed the Auto-Negotiation completed. But, in the receiving data issue, Bit 14 always remained in flicker. It looked the Auto-MDIX algorithm worked but didn't complete. In normal operation, Bit 14 stopped at 0, which meant Auto-MDIX completed.
I think Auto-MDIX is close to the root cause. Below is the system block diagram, 2 pcs of TLK105 and 2 pcs KSZ8721 are used. I want to disable the Auto-MDIX. Should I disable them on both sides (TLK105 and KSZ8721)?
I also would like to disable the auto-negotiation and set a forced mode. Should I do it on both sides as well?
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