28 July 2004

Changes TIM-2->TIM-3A->TIM-3B - Matt Warren 1ATLAS SCT/Pixel TIM FDR/PRR

Physics & AstronomyHEP Electronics

Matthew WarrenJohn Lane, Martin Postranecky

Changes TIM-2 TIM-3A TIM-3B

ATLAS SCT TIM FDR/PRR28 June 2004

28 July 2004

Changes TIM-2->TIM-3A->TIM-3B - Matt Warren 2ATLAS SCT/Pixel TIM FDR/PRR

Background

OUT OF

DATE• TIM-2 produced using AMD/

Lattice MACH5 CPLDs.

• These devices now obsolete

• More importantly, the firmware code is obsolete (obscure DSL language).

• Using modern, large FPGAs provides both cost savings as well as flexibility of having all logic reserves in one place.

• Re-writing the code in a better supported language (VHDL) allows for better code maintainability and greater flexibility when choosing devices.

28 July 2004

Changes TIM-2->TIM-3A->TIM-3B - Matt Warren 3ATLAS SCT/Pixel TIM FDR/PRR

TIM-3 Design

• Xilinx IIE FPGA Family chosen– Xilinx used by all of our collaborators.– Spartan much cheaper than Virtex II (at the time).– New 600E part just released (2003), so family unlikely

to go obsolete soon.

• Two FPGAs used– Smaller 200E part used for VME interface– Larger 600E part performs all ‘TIM’ functions

• Clocks now controlled via dedicated fail-over

MUX/PLLs

FPGA related features are discussed further under in

the Firmware talk.

28 July 2004

Changes TIM-2->TIM-3A->TIM-3B - Matt Warren 4ATLAS SCT/Pixel TIM FDR/PRR

PCBs Compared

•10 CPLD’s reduced to 2 FPGA’s (456 pin BGA).

•32kB RAM and 64x128 FIFO moved into FPGA.

•Most DIL’s replaced by SMD (excl. backplane interfaces)

TIM2 TIM3A

28 July 2004

Changes TIM-2->TIM-3A->TIM-3B - Matt Warren 5ATLAS SCT/Pixel TIM FDR/PRR

Changes for TIM-3B

TIM3B is the pre-production version of TIM.

Only minor changes to TIM-3A design:

• TTCrq QPLL connector added and routed to FPGA

• Various front-panel mods for easier debugging/testing in a full crate.– 16 ‘ROD Busy’ LEDs under FPGA control.– JTAG connection available on front panel.– FPGA ‘Load’ micro-switch for special situations.– Better access to debug connector with possibility of a

front-panel mounting.

• Jumper to disable trigger veto logic.

• PCB stiffener bars added.

28 July 2004

Changes TIM-2->TIM-3A->TIM-3B - Matt Warren 6ATLAS SCT/Pixel TIM FDR/PRR

Coming Soon …