TID and TSJ. William Gu

Data Acquisition

1. Trigger distribution scheme2. TID development3. TID in test setup4. TS development

Trigger Distribution/Data Readout

TI: trigger distribution and ROC readout control;A low jitter global clock (250MHz): pipeline etc.;SYNC: all the front end crate can be synchronized.

TS: Trigger control (physical trigger to physical event), SYNC and Clock generation;TD: TRG/CLK/SYNC optic fanout, link checkTI: trigger distribution, ROC controlSD: TRG/CLK/SYNC fan out (VXS P0)

TID DevelopmentPrototype:

TS, TI, TD or combinations of these individual board functions. This is especially useful for test setups (detail next page)

Production: (one PCB, two assembly)Dedicated TI (one optic transceiver)Dedicated TD (does not drive P0)

Legacy compatibility:With a Mezz card, the TID/TI can

behave like an TI_rev2 board, which can connect to TS_Rev2

TID used in test setup

With TIDs, a system with up to nine crates can be setup. A two-crate system was tested extensively;

Limitation: “TS” trigger inputs: 6 (current firmware); 7 with firmware update;

TI_MASTERTI

TI

TS development

External Trigger INTwo 15-bit orFour 7-bit source synced

TS clock output, orQSFP (driving TI)

TS clock input, orQSFP (driving TI)

16 diff. inputs

12 diff. outputs

10 single-endedoutputs

VME64xVMEJTAG (PROM loading)

VXSTRG/CLOCK/SYNC(pulse mode or serialized mode)

6 x 4 LEDs board status

GTP trigger INTwo 15-bit, or four 7-bit source synced

Optional:Trigger to TD,Busy from TD

TS developmentTrigger: It can accepts up to 30 GTP inputs (from VME P2 backplane) , 30 external inputs (from front panel), and another 15 front panel inputs. It can also generate readout triggers from VME command. (>=) 10-bit trigger (event) types are supported. Every trigger input can be enabled, pre-scaled, and monitored by scalars.

Sync: With the fiber latency measurement (by TI), all the front end crate can be synced to within 4ns (one 250 MHz clock cycle).

Clock: the onboard 250 MHz oscillator, or external input

Backpressure (or DAQ flow control): with BUSY feedback, and status link (opposite link from the TRIGGER word), the DAQ can work in blocking mode, single event locking mode, or free running mode.

TS Development-- Trigger (event) Type lookup table scheme

15x8

15x8

MUX(with

priorities)

VME triggers

15x11

15x11

15x8

16x11

MxN M-bit input, N-bit output memory lookup table.The table is downloaded by software at startup

15

15

8

8

15x8

15x8

16x11

15

15

8

8

15

6

5

5

6

4

4

Trigger(event)Type

GTPTrigger

ExternalTrigger

Front Paneltrigger

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