Does SDAC display data for both the PFD, ND and the ECAM display?
The DMC can process simultaneously 3 pages among them only one system page. DMC 1 and DMC2 are linked to both central displays.

Therefore the display page arrangement is done by the DMCs not by the SDACs, nevertheless lot of data computed by the SDACs are displayed on the ECAMS and on the PFD and on the ND:


On the ECAMs for instance all system pages and AMBER alarms via the FWCs
On the ND and on the PFD flags and degraded conditions, such as the cross « X » when data is NOT computed for the relevant parameter.


Of course my answer is not exhaustif but sufficient to justify that the SDACs are concerned by data displayed on all EIS displays.