1. ATLAS SCT/Pixel TIM FDR/PRR 28 July 2004 Changes TIM-2->TIM-3A->TIM-3B - Matt Warren1 Physics & Astronomy HEP Electronics Matthew Warren John Lane, Martin Postranecky Changes TIM-2  TIM-3A  TIM-3B ATLAS SCT TIM FDR/PRR 28 June 2004

2. ATLAS SCT/Pixel TIM FDR/PRR 28 July 2004 Changes TIM-2->TIM-3A->TIM-3B - Matt Warren2 Background OUT OF DATE TIM-2 produced using AMD/ Lattice MACH5 CPLDs. These devices now obsolete More importantly, the firmware code is obsolete (obscure DSL language).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.

3. ATLAS SCT/Pixel TIM FDR/PRR 28 July 2004 Changes TIM-2->TIM-3A->TIM-3B - Matt Warren3 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.

4. ATLAS SCT/Pixel TIM FDR/PRR 28 July 2004 Changes TIM-2->TIM-3A->TIM-3B - Matt Warren4 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) TIM2TIM3A

5. ATLAS SCT/Pixel TIM FDR/PRR 28 July 2004 Changes TIM-2->TIM-3A->TIM-3B - Matt Warren5 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.

6. ATLAS SCT/Pixel TIM FDR/PRR 28 July 2004 Changes TIM-2->TIM-3A->TIM-3B - Matt Warren6 Coming Soon …