Data Merging
The RD53B chip allows so called link sharing (data-merging mode).
Orion was the first readout which demonstrated 4x1 and 2x1 data-merging modes with FELIX [link], which was used for testing in SR1 [link].
Quad hybrid design
To configure chip in data-merging mode, one should know which version of quad hybrid is used. The following schematics for RD53B ITkPix v1 quad hybrid design are available to the moment:
4x1 merging mode
Tested simultaneous digital scan readout of two quads in SR1 with Felix-Star [link].
This is the largest setup (2 quads), which was tested simultaneously for digital communication with FELIX at the momend. Orion performed parallel digital scan for both quads in about 7 sec.