  The Tile PreProcessor (TilePPr) is the core element of the Tile Calorimeter
(TileCal) off-detector electronics for High-luminosity Large Hadron Collider
(HL-LHC). The TilePPr comprises FPGA-based boards to operate and read out the
TileCal on-detector electronics. The Tile Computer on Module (TileCoM)
mezzanine is embedded within TilePPr to carry out three main functionalities.
These include remote configuration of on-detector electronics and TilePPr
FPGAs, interface the TilePPr with the ATLAS Trigger and Data Acquisition (TDAQ)
system, and interfacing the TilePPr with the ATLAS Detector Control System
(DCS) by providing monitoring data. The TileCoM is a 10-layer board with a Zynq
UltraScale+ ZU2CG for processing data, interface components to integrate with
TilePPr and the power supply to be connected to the Advanced Telecommunication
Computing Architecture carrier. A CentOS embedded Linux is deployed on the
TileCoM to implement the required functionalities for the HL-LHC. In this paper
we present the hardware and firmware developments of the TileCoM system in
terms of remote programming, interface with ATLAS TDAQ system and DCS system.
