ATLAS SCT/Pixel TIM FDR/PRR28 June 2004 TIM Requirements - John Lane1 ATLAS SCT/Pixel TIM FDR/PRR 28 June 2004 Physics & Astronomy HEP Electronics John Lane Martin Postranecky, Matt Warren TIM Requirements

ATLAS SCT/Pixel TIM FDR/PRR28 June 2004 TIM Requirements - John Lane2 TIM Requirements See SCT/Pixel TIM Requirements document: Interface to ROD Interface to BOC Interface to TTC Interface to CTP Interface to local trigger Interface to local processor Transmission of clock and control –Requirement: description Implementation All shown are implemented and tested

ATLAS SCT/Pixel TIM FDR/PRR28 June 2004 TIM Requirements - John Lane3 TIM Requirements Interface to ROD –Output to ROD: commands and event IDs Implemented as crate backplane signals –Front-end resets: different from TTC resets Implemented as ECR and BCR –Busy from ROD: receive and monitor Implemented as crate backplane signals Interface to BOC –Clock distribution: to ROD via BOC Implemented as crate backplane signals

ATLAS SCT/Pixel TIM FDR/PRR28 June 2004 TIM Requirements - John Lane4 TIM Requirements Interface to TTC –Input from TTC: TIM is a TTC destination Received by TTCrx mezzanine card –Latency of TTC commands: TIM L1A latency < 50ns L1A signal clocked once on TIM Interface to CTP –Busy to CTP: masked OR and monitoring Use standard Busy module –Busy from crate: masked OR and monitoring TIM Busy registers

ATLAS SCT/Pixel TIM FDR/PRR28 June 2004 TIM Requirements - John Lane5 TIM Requirements Interface to local trigger –Command deadtime: introduce standalone (Front-end protocol) Implemented as TIM internal busy –Trigger latency: programmable for CAL and external triggers TIM pipeline delay register –Trigger phase timing: synchronize with measurable phase shift A prompt synchronized trigger is output on front panel

ATLAS SCT/Pixel TIM FDR/PRR28 June 2004 TIM Requirements - John Lane6 TIM Requirements Interface to local processor –VME interface: read and write access Implemented in firmware and external buffers –Configuration and monitoring: set and read registers TIM control and status registers –Command execution: including preloaded sequences TIM command register and Sequencer

ATLAS SCT/Pixel TIM FDR/PRR28 June 2004 TIM Requirements - John Lane7 TIM Requirements Transmission of clock and control –Clock source: TTC system, external and internal Selected by TIM enable registers –Clock stability and jitter: relative to LHC phase Use TTCrx clock and phase-locked loop –Clock phase delay: at Front-end and ROD setup and hold TIM delay register and setup switch –Commands required: by Front-end Implemented in firmware –Origin of commands: TTC and standalone Implemented in firmware –Latency of fast commands: synchronized to bunch Implemented in TTCrx –Queuing of event ID: serial streams FIFOs buffer up to 64 events