Hi，
The datasheet did not tell it is pulled-up or pull-down for TDO_IO in the IC of DS125DF1610.
We tested and find TDO_IO always in low voltage if ther is no JTAG signal.
Is it pulled-down in the IC? What's the value of pulled-down?
TMS,TCK,TDI are pulled-up in the IC,What's the value of pulled-up?
As to the TDO_IO, it didn't described it has been internal pull down, so I need to confirm again.
Hi, Kailyn
The TDO of retimer1 connect to TDI of retimer2 through a 0ohm resistor.
When we do boundry scan, the TDI voltage of retimer2 is about 2.6V; if there is no boundry scan, the TDI voltage of retimer2 is only 2.2V.
We remove this 0 ohm resistor and tested the TDO of retimer1, the low voltage is about 66mV.
The TDI voltage should be about 2.5V when there is no boundry scan, but it's only 2.2V, so we think there is something in TDO.
