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1. I A S Vertex Detector Electronics ODE Pre Prototype User Manual Issue 2 Revision 3 Reference IPHE 2000 008 LHCb 2001 057 VELO Created 28 February 2000 Last modified 1 March 2002 Prepared By Yuri Ermoline Vertex Detector Electronics ODE Pre Prototype Ref IPHE 2000 008 LHCb 2001 057 VELO User Manual Issue 2 Revision 3 Abstract Date 1 March 2002 Abstract This document is a user manual for the ODE pre prototype module ODEPP also frequently referred as Read out Board number 2 RB2 The module is under development and new features are implemented in every new version Document Status Sheet Table 1 Document Status Sheet 1 Document Title Vertex Detector Electronics ODE Pre Prototype 2 Document Reference Number IPHE 2000 008 LHCb 2001 057 VELO 3 Issue 4 Revision 5 Date 6 Implemented features 1 0 2 Mar 2000 VME slave interface A24 D32 CSRO CSR1 FIFO VME trigger PDU control MODE 00 implemented continuous data capture starting on trigger 22 Mar 2000 VME reset TTC trigger added 24 bit trigger counter 31 Mar 2000 Changed CSR1 format added 12 bit FIFO counter trigger counter reduced to 12 bits 6 Jun 2000 Added IPHE reference number CSR1 3 1 001 module status Added Appendix A Useful TTCvi commands Added Appendix B FADC card dimensions 10 Aug 2000 VME reset VRST 0 and VME TTCrx reset VRST 1 Version
2. 0 resets TTCrx D31 D2 No action 00 00 Writing to bit 0 VMERESET generates ODEPP module reset see 1 1 Writing 1 and then 0 into bit 1 TTCRESET generates TTCrx reset FIFO 10 FIFO can be accessed read write from VMEbus for test purposes Data BS we f med Gommems D31 D0 VME data FIFO data FIFO test page 5 Vertex Detector Electronics ODE Pre Prototype Ref IPHE 2000 008 LHCb 2001 057 VELO User Manual Issue 2 Revision 3 1 General description Date 1 March 2002 After data acquisition FADC data can be read from the FIFO via VMEbus Daa Bno we ed Comme D7 D0 FADC ch 0 FIFO data FADC data after data acquisition D15 D8 FADC ch 1 FIFO data a D23 D16 FADC ch 2 FIFO data an D31 D24 FADC ch 3 FIFO data in 1 5 ODEPP clock and trigger TTCrx board and OSI card The ODEPP module receives external clock and trigger signals via TTCrx board or OSI cards The TTCrx board contains the TTCrx chip non radhard ES2 version 4 the optical connector with an integrated detector preamplifier and some other components The input optical signal from the TTC transmitter carries 40 MHz clock and trigger signals TTCrx receiver chip can be reset by writing 1 into bit 0 of the VMERESET register The TTCrx status TTCREADY can be read from bit 1 of the CSR1 VME Reset commands Figure 3 In order to operate t
3. 2001 057 VELO Issue 2 Revision 3 Date 1 March 2002 Appendix C FADC card 50 pin DIN 41651 connector layout Signal Pin Pin Signal 5V_ANALOG 1 2 5V_ANALOG CND_ANALOG 3 4 GND_ANALOG 5V_ANALOG 5 6 5V_ANALOG FADC_CLOCK 7 8 ENABLE B 9 10 FADC_B 7 FADC_B 6 11 12 FADC_B 5 FADC_B 4 13 14 FADC_B 3 FADC_B 2 15 16 FADC_B 1 FADC1 BO 17 18 SDA I2C_1 19 20 SCL I2C_1 SDA I2S_2 21 22 SCL I2C_2 23 24 25 26 POWER_DOWN 27 28 TDI TCKO 29 30 TMS TDO 31 32 TRST ENABLE_A 33 34 FADC_A 0 FADC_A 1 35 36 FADC_A 2 FADC AG 37 38 FADC A 4 FADC_A 5 39 40 FADC_A 6 FADCO A7 41 42 43 44 GND DIGITAL 45 46 GND DIGITAL 47 48 5V DIGITAL 49 50 5V DIGITAL reserved for the ECS interface prototype card page 14
4. PDU control code is set to zero after power on and reset To perform a full range input analog data scan the whole ODEPP module clock can be delayed in the TTCrx chip in steps of 104 ps from the TTCvi module 7 page 7 Vertex Detector Electronics ODE Pre Prototype Ref IPHE 2000 008 LHCb 2001 057 VELO User Manual Issue 2 Revision 3 2 Module operation Date 1 March 2002 2 Module operation Module FIFO 2K 32 bit can be tested by writing and reading from VME Number of written words are counted by the 12 bit FIFO counter it is incremented by every write into the FIFO until FIFO is full and is decremented by every read from the FIFO until FIFO is empty it is reset by VMERESET Before starting data acquisition cycle the module has to be reset and the following parameters may be set default values are zeroes PDU control code PDUDLY CSR0 4 0 defines the FADC card connector clock delay relatively to the module clock e TRIGDLY external trigger delay in the range of 0 to 7 clock cycles ODEPP operation mode CSRO 9 8 The following modes are valid e MODE 00 continuous data capture starting on trigger e MODE 01 event data capture starting on trigger and event header e MODE 10 event data capture starting on event header e MODE 11 event data capture starting on trigger e PDBLL and PDBHL the FADC data processing parameters see 2 2 The module can be trig
5. The trigger source is selected by setting CSR1 2 0 The selected trigger is made available as two front panel NIM outputs An internal 24 bit trigger counter which can be read and written through VMEbus counts the number of triggers sent 84 VMEbus module reset generation Write A24 D16 Write access to this address generates module reset 80 CSR1 Input selection and timing Read Write A24 D16 trigger selection CSR 2 0 0 ECL front panel 1 2 3 NIM front panel 4 VMEbus command 5 random 86 VMEbus trigger generation Write A24 D16 Write access to this address generates trigger if CSR 2 0 4 which is sent to the TTCrx chip 88 8A Trigger counter Read Write A24 D16 88 7 0 Trigger Counter 23 16 8A 15 0 Trigger Counter 15 0 The TTCvi module may be used to control the delay of the output clock of the TTCrx chip relatively to the TTCrx input clock from the TTCvx module 7 page 12 Vertex Detector Electronics ODE Pre Prototype User Manual Appendix B FADC card dimensions Ref IPHE 2000 008 LHCb 2001 057 VELO Issue 2 Revision 3 Date 1 March 2002 Appendix B FADC card dimensions 00 TZ 007 007 ke 4 00 Top Side 50 pin DIN 41651 connector op 12 54 117 00 page 13 Vertex Detector Electronics ODE Pre Prototype User Manual Appendix C FADC card 50 pin DIN 41651 connector layout Ref IPHE 2000 008 LHCb
6. amp Revision pseudo digital bit limits CSRO TTCrx status CSR1 1 FADC card connector update new MODE 01 implemented event data capture starting on trigger and event header 2 May 2001 VME TTCrx reset modified OSI card description added new MODE 10 implemented event data capture starting on event header 16 Oct 2001 FIFO counter modified decrement on FIFO read new MODE 11 implemented event data capture starting on trigger 1 Mar 2002 Trigger control modified module is not triggered when FIFO is full external trigger disable bit CSR1 2 and external trigger delay CSRO 7 5 FIFO VME interface modified write to CSRO 1 allowed when module is busy FIFO counter us modified user manual updated page ii Vertex Detector Electronics ODE Pre Prototype Ref IPHE 2000 008 LHCb 2001 057 VELO User Manual Issue 2 Revision 3 Table of Contents Date 1 March 2002 Table of Contents 1 General description 1 1 Module reset and TTCrx reset 1 2 Module clock 1 3 Module triggering 1 4 VME slave interface SE Gad 1 5 ODEPP clock and trigger TTCrx board and OSI card 1 6 FADC card po one 1 7 FADC clock phase adjustment NN DP WWW 2 Module operation BLE ae ee G 2 1 MODE 00 continuous data capture starting on trigger r 2 2 2 MODE 01 event data capture starting on trigger and event header 2 3 MODE 10 event data capture starting o
7. ards are written into the FIFO every clock cycle until the FIFO is full after 2K clock cycles or 51 2 us During this time the ODEPP module is busy and FIFO read write via VME is disabled The FIFO counter is reset by the trigger and then is incremented by every write into the FIFO during data capture The FIFO counter is decremented by every read from the FIFO via VMEbus until FIFO is empty A position of the first event data word in the FIFO depends on the delay between the trigger and the arrival of the data from the front end chip defined by external logic and cabling The trigger signal may be delayed inside the ODEPP module which results in the shifting of the position of the first event data word in the FIFO towards beginning if the FIFO External triggers may be disabled in order to prevent next event data to be written to the FIFO before FIFO is read via VMEbus 2 2 MODE 01 event data capture starting on trigger and event header During this mode after receiving the trigger the synchronization logic in the module starts to search for the event data header pseudo digital 0101 in the analog signal package from the SCTA128 chip 8 The upper limit for the pseudo digital bit low level PDBLL and the lower limit for the pseudo digital bit high level PDBLL are stored in the CSRO see 1 4 They are used by the synchronization logic to define the windows for the digitized SCTA128 data during the header search Up
8. cument ds dsf10k pdf CYPRESS CY7C4231 2Kx9 Sync FIFO http www cypress com cypress prodgate fifo cy7c4231 html 5 Bit Programmable Delay Line http www datadelay com pdul15f pdf TTCrx Reference Manual J Christiansen A Marchioro and P Moreira Version 2 2 http pecvilsi5 cern ch 80 MicDig ttc MANUAL22 PDF Analog Devices Products amp Datasheets Selection Guides http www analog com support standard linear selection guides adc high html TTCvx Technical description and users manual P Gallno Draft May 21 1999 http www cern ch TTC TTCvxManualla pdf TTCvi TTC VMEbus INTERFACE Ph Farthouat P Gallno Rev 1 5 http www cern ch TTC TTCviSpec pdf SCTA128LC amp SCTA128HC version 0 0 13 02 98 page 11 Vertex Detector Electronics ODE Pre Prototype Ref IPHE 2000 008 LHCb 2001 057 VELO User Manual Issue 2 Revision 3 Appendix A Useful TTCvi commands from 7 Date 1 March 2002 Appendix A Useful TTCvi commands from 7 The TTCvi module is A24 A16 D32 D16 and responds to the following Address Modifiers 39 3A 3D 3E standard 29 2D short OF OB 3B 3F block 09 OA OD OE extended Four rotary switches are used to set the base address A23 to A8 The TTCvi module is normally driven by a clock from the TTC transmitter e g TTCvx TTCvi provides four trigger inputs on the front panel 0 ECL 1 2 3 NIM trigger by a VMEbus command and internal random trigger generator
9. dule and the 2 8 bit output data from the FADC card output buffers to the ODEPP module The connector layout is shown in Appendix C 1 7 FADC clock phase adjustment The clock for both FADC cards can be delayed n the range of 0 24 ns relatively to the ODEPP module clock by the programmable delay unit PDU15F 1 5 bit digitally programmable delay line on the ODEPP module The delay between the input clock of the PDU clock on the ODEPP module and the output clock to the FADC cards depends on the PDU control code bits 0 to 4 of the CSRO Delay ns Inherent Delay ns Increment Delay ns Control Code hex where Inherent Delay 9 ns Increment Delay 1 ns The FADC AD9059 has aperture time of about 3 ns Therefore the real measurement time relatively to the ODEPP module clock is additionally delayed by 3 ns The measuring time for different codes are given in the table below Time Gode fine op 9 06 18 0 16 OE 1 17 10 07 19 OF 2 18 11 08 20 10 3 00 12 09 21 11 4 01 13 OA 22 12 5 02 14 OB 23 13 6 03 15 OC 24 14 7 04 16 15 8 05 17 The control codes 19 to 1F are equal to control codes 00 to 06 clock delay of 25 ns is equal to zero clock delay The control codes from 10 to 16 shall not be used as the FADC data are not guaranteed to be stable relatively to the ODEPP module clock The
10. e configuration EPROM EPC1PC8 Data buffers address comparators and Base address rotary switches for the VMEbus slave interface A24 D32 which is used as a control and monitoring interface to the module 2K 32 bit of FIFO 4 SyncFIFO chips Cypress CY7C4231 15 ns access time 2 40 MHz internal clock oscillator programmable delay unit for FADC clock delay PDU15F 1 from Data Delay Devices 3 LEMO connector for the BUSY output signal TTL open collector active low the Reset button and the green LED Connectors to a TTCrx board carrying a TTCrx chip 4 the receiver chip of the Timing Trigger and Control TTC system CERN microelectronics group design 2 connectors for FADC cards 2 channels 8 bit 40 MHz based on AD9059 from Analog Devices 5 and voltage regulators for FADC cards analog power One of the FADC cards can be replaced by the ECS interface prototype or the level 1 trigger pre processor interface prototype page 1 Vertex Detector Electronics ODE Pre Prototype Ref PHE 2000 008 LHCb 2001 057 VELO User Manual Issue 2 Revision 3 1 General description Date 1 March 2002 TTCrx board connectors Jumper Osc Conf EPROM FPGA PDU LED Rotary FIFO switches SW2 SW3 7 p 4 BUSY A SW4 SW5 noso M TTCrx Z i board ty VMEbus Peete ee eeeseesres eee FADC card FADC card connectors Analog power Figure 2 page 2 Vertex Detector Electronics ODE Pre Prototype Re
11. er than 40 MHz e g for test purposes Clocks for the FADC card connectors may be delayed in the range of 0 24 ns relatively to the ODEPP module clock by the programmable delay unit see 1 4 and 1 7 This feature may be used to perform the input analog data scan with certain scan range restrictions The whole ODEPP module clock can be delayed in the TTCrx chip in steps of 104 ps relatively to the TTC transmitter The TTCrx chip is controlled from the TTCvi module see 1 5 This feature may be used to perform a full range input analog data scan 1 3 Module triggering The ODEPP module can be triggered if the module is not BUSY and the FIFO is not full e from the VMEbus by writing 1 into bit 1 of the CSR1 register see 1 4 e from the external trigger system via TTCrx chip using TTC system or OSI card External trigger can be disabled by writing 1 into bit 2 of the CSR1 and delayed in the range of 0 to 7 clock cycles see 1 4 The triggers from VMEbus or external are counted by the 12 bit TRIGCNTR counter which can be read from CSR1 bits 4 to 15 page 3 Vertex Detector Electronics ODE Pre Prototype Ref IPHE 2000 008 LHCb 2001 057 VELO User Manual 1 General description Issue 2 Revision 3 Date 1 March 2002 1 4 VME slave interface The ODEPP module uses the P1 and P2 VMEbus connectors and works in A24 D32 mode Block Transfer mode is not implemented The recognized Address Modifier code
12. f IPHE 2000 008 LHCb 2001 057 VELO User Manual Issue 2 Revision 3 1 General description Date 1 March 2002 1 1 Module reset and TTCrx reset The ODEPP module are reset on power on sets to zero the module registers counters and FIFO read write pointers and can be reset by pressing push button Reset on the front panel or writing 1 into bit 0 of the VMERESET register see 1 4 The TTCrx chip reset signal may be generated by writing 1 and then 0 into bit 1 of the VMERESET register The TTCrx chip reset procedure takes some times and during this time the ODEPP module is not operational TTCrx status 1 TTCrx is ready can be read from bit 1 of the CSR1 register The ODEPP module has to be reset after resetting the TTCrx chip as internal registers may be in undefined states 1 2 Module clock The ODEPP module can be driven by internal clock from the 40 MHz clock oscillator or by external clock the clock source can be chosen by the jumper on the ODEPP module see Figure 2 e jumper inserted internal 40 MHz clock from the oscillator e jumper removed external clock The external the clock may be generated see 1 5 e by the TTC system 40 MHz clock and delivered to the ODEPP board via optical fibre to the TTCrx chip located on the TTCrx board e by external clock generator e g SEQSI module and delivered to the ODEPP board via coaxial cable to the OSI card this clock may have frequency oth
13. gered from VME or external logic see 1 3 while in modes 00 01 or 11 and the module is not BUSY and the FIFO is not full The triggers are counted by the 12 bit TRIGGER Counter which can be read from CSR1 15 4 The trigger signal also resets the 12 bit FIFO counter During the data acquisition the ODEPP module is busy see next paragraphs and e MODBUSY is asserted and can be checked by reading CSR1 0 e BUSY output signal TTL open collector active low on the front panel LEMO connector is asserted e CSRO CSR1 and VMERESET registers can be read and witten from the VMEbus e FIFO read and write is disabled while ODEPP module is busy see next paragraphs due to the asynchronous VMEbus cycles this can be transparent if not generates VMEbus time out e 12 bit FIFO counter counts the number of data words written into FIFO and can be read via CSR1 31 20 The status of the ODEPP module MODBUSY and the FIFO FIFO full FIFO empty and FIFO counter can be checked via CSR1 during and after data acquisition The FADC data can be read from the FIFO via the VMEbus interface after data acquisition page 8 Vertex Detector Electronics ODE Pre Prototype Ref IPHE 2000 008 LHCb 2001 057 VELO User Manual Issue 2 Revision 3 2 Module operation Date 1 March 2002 2 1 MODE 00 continuous data capture starting on trigger During this mode after receiving the trigger the output data from the FADC c
14. he TTCrx board the TTC transmitter TTCvx 6 and the TTC control module TTCvi 7 are necessary as shown on the Figure 3 The 40 00 MHz clock signal ECL levels and the Trigger signal NIM or ECL levels are provided by the external logic e g SEQSI module Some useful TTCvi VMEbus commands are shown in Appendix A The OSI ODE to SEQSI Interface card is a simple electrical replacement of the TTCrx board Card has two LEMOOOC connectors for Clock and Trigger input NIM signals and can be driven directly by the external logic e g SEQSI module without need for the TTCvi and TTCvx modules OSI card provides clock and trigger signals to the ODEPP module and doesn t need a reset page 6 Vertex Detector Electronics ODE Pre Prototype Ref IPHE 2000 008 LHCb 2001 057 VELO User Manual Issue 2 Revision 3 1 General description Date 1 March 2002 1 6 FADC card The 2 channels FADC card drawing in Appendix B contain input link receivers amplifiers analog to digital converter AD9059 dual 8 bit 60 MSPS A D converter and output buffers The input signals from the LEMO connectors EPG 0B 302 HLN are differential in the range from 0 to 1 Volts The upper LEMO connector on the upper FADC card corresponds to FADC channel 3 and the lower LEMO connector on the lower FADC card to FADC channel 0 The 50 pin DIN 41651 connector provides the digital and analog power FADC clock and data enable signals for the FADC card from the ODEPP mo
15. itten into the FIFO for all events The FIFO counter is decremented by every read from the FIFO via VMEbus until FIFO is empty The status of the FIFO FIFO full FIFO empty and FIFO counter can be checked via CSR1 during data acquisition The event data can be read from the FIFO via the VMEbus when module is not busy 2 4 MODE 11 event data capture starting on trigger Module operation in this mode is similar to the continuous data capture starting on trigger MODE 00 with the exception that the number of word written to the FIFO is limited per event to 256 Therefore up to 8 event may be stored in the FIFO until the FIFO is full During event data write into the FIFO 256 words the ODEPP module is busy and FIFO read write via VME is disabled The FIFO counter is incremented by every write into the FIFO It is reset by every new trigger and therefore contains the number of word written into the FIFO for the last event The FIFO counter is decremented by every read from the FIFO via VMEbus until FIFO is empty As in the MODE 00 external trigger may be delayed and disabled page 10 Vertex Detector Electronics ODE Pre Prototype Ref IPHE 2000 008 LHCb 2001 057 VELO User Manual 3 References Issue 2 Revision 3 Date 1 March 2002 3 References 1 2 3 4 5 6 7 8 FLEX 10K Embedded Programmable Logic Family Data Sheet ver 4 01 June 1999 http www altera com do
16. n event header o 00 o 2 4 MODE 11 event data capture starting on trigger r r 3 References N Appendix A Useful TTCvi commands from 7 oo Appendix B FADC card dimensions A Appendix C FADC card 50 pin DIN 41651 connector layout page iii Vertex Detector Electronics ODE Pre Prototype Ref IPHE 2000 008 LHCb 2001 057 VELO Issue 2 Revision 3 Date 1 March 2002 User Manual Glossary Glossary FADC FIFO FPGA ODE TTC Flash Analog to Digital Converter First In First Out Field Programmable Gate Array Off Detector Electronics Timing Trigger and Control page iv Vertex Detector Electronics ODE Pre Prototype Ref IPHE 2000 008 LHCb 2001 057 VELO User Manual 1 General description Issue 2 Revision 3 Date 1 March 2002 1 General description Vertex detector ODE pre prototype module ODEPP also frequently referred as Read out Board number 2 RB2 is designed for the read out of up to 4 analog links with multiplexed signals from the vertex detector front end chip s at 40 MHz ODEPP is a 6U VME module 2 unit wide It consists of a main VME board and 3 daughter cards as shown on the Figure 1 Figure 1 The main VME board provides see also Figure 2 Altera FLEX PFGA EPF10K50RC240 3 2880 logic elements and 10 embedded array blocks of RAM 2K bit each 1 connector for FPGA configuration via down load cable and socket for th
17. neral description Ref IPHE 2000 008 LHCb 2001 057 VELO Issue 2 Revision 3 Date 1 March 2002 Control Status Register 1 CSR1 04 ER OE dn En VMETRIG MODBUSY Start data acquisition from VMEbus D1 No action TTCREADY TTCrx receiver chip ready D2 TRIGDIS TRIGDIS External trigger disable D3 No action 0 D15 D4 No action TRIGCNTR 12 bit TRIGGER up counter D16 No action FIFO Full if 1 FIFO is full D17 No action FIFO Empty if 1 FIFO is empty D19 D18 No action 00 D31 D20 No action FIFOCNTR 12 bit FIFO up counter CSR1 is used to control and monitor the ODEPP module operation VMETRIG module triggering from the VMEbus starts data acquisition see 2 MODBUSY set to 1 according to the MODE of operation during data acquisition TTCREADY status of the TTCrx receiver chip TRIGDIS disable external trigger when set to 1 e TRIGCNTR 12 bit counter of triggers from VMEbus or external reset by VMERESET from VMEbus e FIFO status bits Full and Empty FIFO is empty after VMERESET e FIFOCNTR the FIFO counter it is incremented by every write into the FIFO until FIFO is full and is decremented by every read from the FIFO until FIFO is empty it is reset by VMERESET and by every new trigger VMERESET Register VRST 08 LO e e VMERESET Reset from VMEbus D1 TTCRESET TTCRESET Writing 1 and then
18. on detecting the header the 12 bit TRIGCNTR counter value is written into the FIFO followed by the SCTA128 event data 144 8 bit words Up to 14 events can be stored in the FIFO until the FIFO is full last event may not be completely written into the FIFO if there is no enough space left During event data write into the FIFO 145 words TRIGCNTR plus event data the ODEPP module is busy and FIFO read write via VME is disabled The FIFO counter is incremented by every write into the FIFO It is reset by every new trigger and therefore contains the number of word written into the FIFO for the last event The FIFO counter is decremented by every read from the FIFO via VMEbus until FIFO is empty As in the MODE 00 external trigger may be delayed and disabled 2 3 MODE 10 event data capture starting on event header Module operation in this mode is similar to the MODE 01 with the exception that the synchronization logic in the module starts to search for the event data header without waiting for the trigger During event data write into the FIFO 145 words TRIGCNTR plus event data the ODEPP module is busy and FIFO read write via VME is disabled page 9 Vertex Detector Electronics ODE Pre Prototype Ref IPHE 2000 008 LHCb 2001 057 VELO User Manual Issue 2 Revision 3 2 Module operation Date 1 March 2002 The FIFO counter is incremented by every write into the FIFO and contains the total number of word wr
19. s are 3E 3D 3A 39 standard access The modules s 16 bit Base Address VME address bits A24 A08 can be selected by 4 internal rotary switches see Figure 2 in the range 0000 FFFF hex SW2 VME address bits A23 A20 SW3 VME address bits A19 A16 SW4 VME address bits A15 A12 SW5 VME address bits A11 A08 The address map of the ODEPP module is shown below 00 hex CSRO 04 hex CSR1 08 hex VRST 10 hex FIFO Control Status Register 0 CSRO 00 Data Bs wie J med Commems D4 D0 PDUDLY PDUDLY FADC cards clock delay D7 D5 TRIGDLY TRIGDLY External trigger delay D9 D8 MODE MODE Operation modes D11 D10 No action 00 D13 D12 No action REVISION ODEPP module design revision D15 D14 No action VERSION ODEPP module design version D23 D16 PDBLL control PDBLL status Pseudo Digital Bit Low Limit D31 D24 PDBHL control PDBHL status Pseudo Digital Bit High Limit CSRO provides storage for the static parameters of the ODEPP module PDUDLY programmable delay unit control value for the FADC cards clock delay in the range of 0 24 ns relatively to the ODEPP module clock see 1 7 TRIGDLY external trigger delay in the range of 0 to 7 clock cycles MODE the module operation mode see 2 PDBLL and PDBHL the FADC data processing parameters see 2 2 page 4 Vertex Detector Electronics ODE Pre Prototype User Manual 1 Ge
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