JLAB VME VSCM

CLAS12 SVT readout board, designed by JLAB Fast Electronics Group (Ben Raydo).

Preliminary document 1: (pdf) (docx)

Preliminary document 2: (pdf) (docx)

SVT2 testsetup: contains VSCM board(s), SD, TI and compactflash-based CPU. To start CODA ssh clasrun@svt2 and type svt2_start. To kill CODA type svt2_exit. Config file: $CLAS/parms/vscm/VSCMConfig.txt.

Data format from the board:

<dictEntry name="SVT Hadrware Data" tag="0x0000" num="0" type="uint32">
     <description>
           0(31:27)=0x10+0x00 "BLKHDR"
              0(26:22)        "SLOTID"
              0(21:11)        "NEVENTS"
              0(10:00)        "BLOCK"
           0(31:27)=0x10+0x01 "BLKTLR"
              0(26:22)        "SLOTID"
              0(21:0)         "NWORDS"
           0(31:27)=0x10+0x02 "EVTHDR"
              0(26:0)         "EVENT"
           0(31:27)=0x10+0x03 "TRGTIME"
              0(23:0)         "TIMEH"
              1(23:0)         "TIMEL"
           0(31:27)=0x10+0x08 "FSSREVT"
              0(22:22)        "HFCBID"
              0(21:19)        "CHIPID"
              0(18:12)        "CH"
              0(11:04)        "BCO"
              0(02:00)        "ADC"
           0(31:27)=0x10+0x0E "DNV"
           0(31:27)=0x10+0x0F "FILLER"
     </description>
</dictEntry>

Data format after ROL2:

<dictEntry name="SVT Raw Data" tag="0xe104" num="0" type="uint32"> <description>

           0(31:27)=0x10+0x08 "FSSREVT"
              0(22:22)        "HFCBID"
              0(21:19)        "CHIPID"
              0(18:12)        "CH"
              0(11:04)        "LATENCY"
              0(02:00)        "ADC"

</description> </dictEntry>