ATLAS MDT Read-out Driver (MROD)
(NIKHEF)

DESCRIPTION

The MROD (MDT Read Out Driver) has to build event fragments from the data of 6 muon chambers. On each muon chamber the data of at maximum 18 TDCs, with 24 channels each, will be multiplexed on one S-Link, so the MROD will have 6 S-Link inputs and one S-Link output to the ROB (Read-Out Buffer) via the Read Out Link.

With an MCRUSH and a ShaSLINK module, which make up the MROD-0 system the design is studied. The hardware of the MCRUSH and the CRUSH module (used for a study of the ROB design) are the same, only the FPGA is reprogrammed with totally different logic.

The MCRUSH can handle the data produced by 18 TDCs, do event building using the Tetris register (this signals availability of the data of the event to be  build), signal various error conditions and potentially recover from errors. For testing the design the data source for the S-link input (the Chamber Service Module (CSM) on a muon chamber) can be emulated with a ShaSLINK module and appropriate software sending data from the PCI-bus to the S-Link output.

Output data of up to five other MCRUSH modules will be simulated and fed through Sharc-Links to the ShaSLINK module of the MROD-0 for testing the behaviour of the output part of a full MROD receiving data from 6 chambers.

STATUS

17 January 2000 Testing is under way, small problems with the MCRUSH FPGA have been corrected.

DOCUMENTATION

CONTACTS

CERN - High Speed Interconnect - S-LINK
Peter Jansweijer - Erik van der Bij - 10 February 2000