The PreProcessor module for the ATLAS Tile Calorimeter at the HL-LHC

Abstract The Tile Calorimeter(TileCal) is the central hadronic calorimeterof the ATLAS experimentat the Large Hadron Collider(LHC). In 2026, the LHC will be upgradedto the High Luminosity LHC (HL-LHC) allowing it to deliver up to 7 times the nominal instantaneous design luminosity. The Phase-II TileCal Upgradewill accommodate the detector and data acquisition system to the HL-LHC requirements. The on- and off-detector electronics will be completely redesigned using a new readout architecture with a full-digital trigger system. The upgradedon-detector electronics will transfer digitized datafor every bunch crossing ( ∼ 25 ns) to the Tile PreProcessorsystem in the counting rooms, requiring a total data bandwidth of 40 Tbps. The TilePPr will store the detector data in pipeline memories to meet the new ATLAS Trigger and Data Acquisition architecture requirements, and will interface with the FELIX system and the first level trigger system.