How to detect connection by GPIB

[NoAngel]

Using TNT4882 chip. Using REN line to detect remote connection. The problem is when user connecting to other device, that connected at parallel line, using long GPIB cable, my device goes to remote mode. I need some register of TNT, using of that I may detect that user is opened connection by GPIB, and that connection is exactly with my device. Please help.
Thanks.

[NoAngel]

TNT4882 is used in One-Chip Mode.

[Steven_T]

Hello NoAngel,

According to the TNT4882 manual (page C-10).  Your instrument should not be paying attention to the REN line unless it is addressed to listen.  So it should go into remote if REN happens and it is addressed to listen.  The ADSR has a listener bit [LA] that you can use.

Let me know if you have already tried this.

Steven T.

[NoAngel]

Thank You, Steven T!

I tested LA bit state, when connected to my device it becomes high, when my device closed it's still high, when other device on parallel line is open it's low. So I think that it's possible to use LA + REN for detecting connection exactly to my device.