Hello friends! I'm trying to transmit data through jesd204b IP and create an example for it. My question: why is it not started? all n_resets are at null. How can I start it?

​Assuming you followed the reset guidelines in the transceiver user guide, then likely causes of not starting include

(a) PLL's not locking due to reference clock frequency, termination, i/o standard, or signal integrity.

(b) Improper I/o standards (JESD typically uses CML) and/or terminations on the JESD lanes.

(c) Core is stuck in synchronization mode, which will be indicated by the dev_sync_n line stuck low.

(d) The JESD sysref is not being driven properly during the synchronization stage.

In my opinion the most useful reference design is the one generated by the JESD204B IP; open your instance then use the "Example Design" tab to set options and generate your own example design.