Thank you very much for your quick answer, dittohead. I had read this about the holdoff and so on in the 7210 reference manual. However, what was confusing me (and I don't have clear yet), is what it is mentioned on this manual about the compatibility with the 488.1 and 488.2 standards of the NAT7210. If the micro which is managing the 7210 is the one that has to interpret the GPIB messages, which is the meaning of being .1 or .2 compatible?
So to say, then all the processing job has to be done by the micro, is it right? For example, for the "*IDN?" command would be the sequence as follows?
-the NAT7210 captures first a "*" and generates an interruption and the holdoff.
-the micro reads the DIR register and the holdoff is released.
-the next byte ("I") is se
nt and captured by the NAT7210...
...and the story goes on, until the EOS (or EOI) is received, and then the micro proceeds accordingly. Would it be like this?
Sorry to ask you for a so a simple question, but I am just starting with this. By the way, do you know where is possible to get detailed info about the IEEE488.1 and IEEE488.2?
Thank you once again for your answer.