UNI EN ISO 9001 CERT. N CAEN VME course for beginners Carlo Tintori Kolkata-Mumbai May 2009

Reproduction, transfer, distribution of part or all of the contents in this document in any form without prior written permission of CAEN S.p.A. is prohibited May 2009VME course for beginners2 indexindex Cap. 1: Introduction to the VME standards Cap. 2: VME architecture and protocols Cap. 3: Setting up a VME acquisition system Cap. 4: Examples of Software for VME systems

Reproduction, transfer, distribution of part or all of the contents in this document in any form without prior written permission of CAEN S.p.A. is prohibited May 2009VME course for beginners3 preamble CAEN has been designing VME boards for more than 20 years; today our VME products are the result of the long experience in the field of physics applications and the interaction with our customers all over the world. This presentation describes general characteristics and features of the VME bus that can be applied to any VME product available on the market. However, it reflects our know-how and our view of the VME standards. The course focuses on the issues that we consider more related to the physics applications and it can not be considered as an exhaustive VME treatise. The practical examples will be done using CAEN modules, drivers and libraries

Chapter Introduction to the VME standards

Reproduction, transfer, distribution of part or all of the contents in this document in any form without prior written permission of CAEN S.p.A. is prohibited May 2009VME course for beginners5 What is VME VMEbus is a master-slave computer architecture VME stands for VERSA-Module Eurocard the standard defines electrical and mechanical specifications it was introduced in 1981 for industrial, commercial and military applications VITA (VME International Trade Association) is the organisation whose purpose is to promote and develop the VME

Reproduction, transfer, distribution of part or all of the contents in this document in any form without prior written permission of CAEN S.p.A. is prohibited May 2009VME course for beginners6 VME at a glance VME crate (chassis) smart fan units VME masterVME slaves power supply backplane

Reproduction, transfer, distribution of part or all of the contents in this document in any form without prior written permission of CAEN S.p.A. is prohibited May 2009VME course for beginners7 Unlike NIM and CAMAC, the VME was created for the industry and not for physics applications However, the North American, European and Japanese physics communities have joined to work with the VITA and found the VME International Physics Association (VIPA) Two standards have been created: VME/V430 (1990) and VME64xP (1998) VME for physics

Reproduction, transfer, distribution of part or all of the contents in this document in any form without prior written permission of CAEN S.p.A. is prohibited May 2009VME course for beginners8 The standards: VME Born in row P1/P2 connectors type DIN-96pin 32 bit wide Address and Data buses Bandwidth up to 40MBytes/s (BLT) Power Supplies: +5,  12 Up to 21 card slots can be used in a single backplane VME (IEEE ) P1 P2 DIN-96pin Connector

Reproduction, transfer, distribution of part or all of the contents in this document in any form without prior written permission of CAEN S.p.A. is prohibited May 2009VME course for beginners9 The standards: VME64 Born in 1989 Same mechanics as the VME Fully backwards compatible 64 bit wide multiplexed Address and Data buses Bandwidth up to 80MBytes/s (MBLT) VME64 (ANSI/VITA ) P1 P2

Reproduction, transfer, distribution of part or all of the contents in this document in any form without prior written permission of CAEN S.p.A. is prohibited May 2009VME course for beginners10 The standards: V430 Born in 1990 Additional 3-row PAUX connector type DIN-30pin Geographical Addressing Dedicated trigger and clock lines Extra Power Supplies: -5, -2,  15 Not fully compatible with VME64!!!  VME/V430 (CERN) P1 P2 PAUX

Reproduction, transfer, distribution of part or all of the contents in this document in any form without prior written permission of CAEN S.p.A. is prohibited May 2009VME course for beginners11 The standards: VME64x Born in row P1/P2 connectors (160 pins) P0 connector (metric 95 pins, optional) Bandwidth up to 160 MBytes/s (2eVME) Geographical Addressing Power Supplies: +5,  12, +3.3, +48, u.d. Live Insertion, ESD-EMC features VME64x (VITA ) P1 P2 P0

Reproduction, transfer, distribution of part or all of the contents in this document in any form without prior written permission of CAEN S.p.A. is prohibited May 2009VME course for beginners12 5 row P1/P2 connectors BACKWARD AND FORWARD COMPATIBILITY thanks to the mechanical design of the 5-row connectors, older legacy boards will fit into new backplanes (and vice-versa) Precharge pins 96 pin row a,b,c + 64 pin row d,z

Reproduction, transfer, distribution of part or all of the contents in this document in any form without prior written permission of CAEN S.p.A. is prohibited May 2009VME course for beginners13 VME64X mechanics IEEE Std ESD-EMC shielding panel Anticipated ground connection Alignment pins Insertion-Extraction handles Keying (prevents damages due to incompatible power supply) Warning: VME64 and VME64x boards and backplanes can always mate; however, VME64x boards may not fit the mechanics of the VME64 crates

Reproduction, transfer, distribution of part or all of the contents in this document in any form without prior written permission of CAEN S.p.A. is prohibited May 2009VME course for beginners14 The standards: VME64xP Fully compatible with VME64x Definition of power supplies in P0 connector Some options are made mandatory Definition of 9U board size Special transfer protocols for Physics (Chained Block Transfer, MultiCast…) NOT A NEW STANDARD!!! VME64xP (VIPA) (VITA ) P1 P2 P0

Reproduction, transfer, distribution of part or all of the contents in this document in any form without prior written permission of CAEN S.p.A. is prohibited May 2009VME course for beginners15 The standards: 2eSST Born in 1997 (VME320 backplane by Arizona Digital, Inc.) Same mechanics as the VME64x Implemented 2eSST protocol for high speed data transfer Bandwidth up to 320 MBytes/s (2eSST) std VME64x backplanes New backplanes layout which reduces parasitic capacitance and inductance up to 1GByte VME2eSST (VITA ) P1 P2 P0

Reproduction, transfer, distribution of part or all of the contents in this document in any form without prior written permission of CAEN S.p.A. is prohibited May 2009VME course for beginners16 The standards: VXS (VITA 41) VXS: VME Switched Serial (VITA 41) Transition to the legacy parallel bus to one or more high speed serial links (switched fabric) High speed new P0 connector designed to support up to 6Gbps Backwards compatibility with the VMEbus ecosystem Definition of multiple interconnect technologies: VITA 41.1: InfiniBand VITA 41.2: Serial RapidIO VITA 41.3: 1000BaseCX Ethernet VITA 41.4: PCI Express VITA 41.5: Aurora 45 GB/s with today’s fabric speeds (could grow to 180 GB/s)!

Reproduction, transfer, distribution of part or all of the contents in this document in any form without prior written permission of CAEN S.p.A. is prohibited May 2009VME course for beginners17 Payload and Switch boards Payload board Switch board Alignment and Protocol Keying example of dual star backplane New high-speed P0 (different from P0 in VME64x) different backplane topologies are available

Reproduction, transfer, distribution of part or all of the contents in this document in any form without prior written permission of CAEN S.p.A. is prohibited May 2009VME course for beginners18 Example of VXS products

Reproduction, transfer, distribution of part or all of the contents in this document in any form without prior written permission of CAEN S.p.A. is prohibited May 2009VME course for beginners19 The standards: VPX (VITA 46) New 7-row connector rated for signalling rates up to 6.25Gbps High speed serial connectivity PMC and XMC mezzanines Ruggedized solutions Conduction cooling Mainly used for military applications VITA46

Reproduction, transfer, distribution of part or all of the contents in this document in any form without prior written permission of CAEN S.p.A. is prohibited May 2009VME course for beginners20 Hybrid backplanes Concept of a hybrid backplane is fundamental to VITA 46 Retain customers existing $$$ investment in VME boards Accepts all existing VME modules - with and without P0 connector VME64xVXSVITA 46

Reproduction, transfer, distribution of part or all of the contents in this document in any form without prior written permission of CAEN S.p.A. is prohibited May 2009VME course for beginners21 VME Mechanics 3U P1 160 x 100 mm P0 6U P1 P2 160 x 233 mm P1 P0 P2 P3 P4 J1/P1 DIN 96 pins 3 rows x 32 J1/P1 & J2/P2 DIN 160 pins 5 rows x 32 J0/P0 J4/P4 metric 95 pins 5+2 rows x 19 (2 mm) J5/P5 metric 110 pins J6/P6 metric 125 pins VME64XP 9U P1 P0 P2 P5 P4 P6 367 X 400 mm

Reproduction, transfer, distribution of part or all of the contents in this document in any form without prior written permission of CAEN S.p.A. is prohibited May 2009VME course for beginners22 Rear Transition Modules 3U, 6U and even 9U size 64 user defined lines available on P2 Further free lines on the 5 rows connectors Can be used to implement an auxiliary bus in parallel to the VME

Reproduction, transfer, distribution of part or all of the contents in this document in any form without prior written permission of CAEN S.p.A. is prohibited May 2009VME course for beginners23 +5V is always available with high current (200A or more) ±12V is always available but the current may be rather low; sometimes DC-DC converters are used to generate ±12V from +5V (CAEN does that for some modules) +3.3V is available in VME64x only on the external rows; it should not be used in case of backward compatibility (not used by CAEN) +48V is available in VME64x only and is normally used for the switching DC-DC converters (not used by CAEN) -5V and -2V (mainly for ECL) can be taken either from JAUX (V430 version only) or from internal DC-DC converters. It is recommended not to use them for compatibility reasons. ±15V from JAUX only; It is recommended not to use them for compatibility reasons. Power supplies

Reproduction, transfer, distribution of part or all of the contents in this document in any form without prior written permission of CAEN S.p.A. is prohibited May 2009VME course for beginners24 Transfer rate As the VME is an asynchronous bus, the bandwidth indicated is a theoretical limit Usually the actual transfer rate is less than 50% of the bandwidth Except Synchronous 2eSST: 95% protocol efficency (~ 300 MB/sec)

Reproduction, transfer, distribution of part or all of the contents in this document in any form without prior written permission of CAEN S.p.A. is prohibited May 2009VME course for beginners25 The standards: summary

Reproduction, transfer, distribution of part or all of the contents in this document in any form without prior written permission of CAEN S.p.A. is prohibited May 2009VME course for beginners26 VME Ref. VMEbus Handbook by Wade Peterson, published by VITA A readable reiteration of the VMEbus specifications with much background material VMEbus International Trade Association (VITA) 126 Members (CAEN & CERN) CERN documentation: VITA Standards Organisation – VSO ftp.caen.it username: caenvme passwd: bitto12ftp.caen.it