ZMID4200 through a Level shifter

Question

Hello 
 I am trying to talk with the ZMID4200 using a RP20240 through the OneWire interface. Since the RP2040 has an IO voltage of 3V3, I'm using a level shifter (TXS0108E) between the two. 
 ZMID side is as follow

As a Test, I am trying to read the "factory traceability code 0" at register address 0x0F by sending 0xCF. 
 Without the ZMID, I can see the level shifter outputing a clear signal (CH1) between 0 and 5V. 
 
 But when I connect the ZMID, the analog output coming from it completely overpowers the level shifter output (image2). Since the sensor is midway, the value read is fixed at 2V5 with a slight interference from the level shifter.

Is there something I can do for the ZMID to stop outputting the analog signal? iI it even possible to use OneWire interface trough a level shifter?

Diogo · Accepted Answer

Thank you for the answer, I've solved my signal problem. I was missing the Command Mode message during tAUTHORIZATION

raja · Answer

Hi Diogo, 
 Thanks for the request and reaching to the online support team. Yes, it is possible to use one wire interface through level shifter. I think there is something wrong with the level shifter. Your level shifter is unable to drive the load (slave device)/not able to communicate. So, could you please use another lever shifter and update us? 
 For one wire interface I have also attached one documents please go through that. 
 ZMID4200 Technical Brief OWI Interface (renesas.com) 
 Regards: 
 Raja.

ZMID4200 through a Level shifter

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