AN A320 FLT CREW EXPERIENCED ECAM 'AVIONICS COOLING FAULT.' THEY FOLLOWED PROCEDURE; DECLARED AN EMERGENCY; AND DIVERTED TO THE NEAREST SUITABLE ARPT.

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CRUISING AT FL380 ENRTE FROM ZZZ TO ZZZ2; OVERHEAD ZZZ1; WE NOTICED THE COCKPIT GOT QUIET FOLLOWED BY AN ECAM FOR AVIONICS COOLING FAULT. WE HAD COMPLETED THE STEPS FOR THIS ECAM AND WERE IN THE PROCESS OF CONTACTING MAINT FOR FURTHER INFO WHEN WE GOT ANOTHER ECAM FOR AVIONICS SMOKE THAT CALLED FOR US TO LAND ASAP. WE MASKED UP AND DECLARED AN EMER. DECIDING UPON ZZZ1 AS THE DIVERT. AT NO TIME DURING THE EMER WAS SMOKE DETECTED BY FLT CREW OR PAX IN EITHER THE COCKPIT OR THE CABIN. FLT ATTENDANTS WERE NOTIFIED OF THE NATURE OF THE EMER AND TOLD TO PREPARE FOR A 'CABIN ADVISORY.' WE COMPLETED THE ECAM AND SENT A MESSAGE TO DISPATCH ADVISING WE WERE HEADED TO ZZZ1 AS A DIVERT. UNEVENTFUL LNDG WAS MADE AT ZZZ1. WE TAXIED CLR UNDER SHIP'S PWR AND ADVISED PAX AND FLT ATTENDANTS TO REMAIN SEATED. WE HAD ZZZ1 FIRE FIGHTING PERSONNEL INSPECT THE AVIONICS COMPARTMENT AND THEY FOUND NO EVIDENCE OF SMOKE OR FIRE. AT THIS POINT WE TAXIED TO GATE UNDER SHIP'S PWR AND DEPLANED THE ACFT NORMALLY VIA THE JETWAY.