cPCI-DartBase
cPCI 3U Compatible Base Board to support mezzanine cards

Block Diagram shown with "DartBoard" mezzanine card






Do you need to develop your own cPCI application HW and prefer a mezzanine approach? Dynamic Engineering offers a line of PMC carriers and the cPCI-DartBase for this purpose. The advantages of "DartBase" include access to more of the cPCI 3U bezel, more built in power options, more surface area for the mezzanine and fewer pins required for the bus interface. Analog, Digital and mixed designs are supported with the clean power supplies and tied at the connector analog and digital return paths. For PXI chassis the clocks and timing control signals are routed to the mezzanine position.

Power from the cPCI system is routed to the mezzanine connector to support the +/-12V, 3.3 and 5V rails. In addition the 5V is used with buck and boost supplies to create +/- 6V power rails. The 6V rails are provided to the mezzanine and used to generate the 1.25V and 2.5V ref voltages through linear supplies to serve as analog references. 1.5A of 2.5V analog power is also supplied with a linear regulator from the 3.3V supply for operating analog circuits. Approximately 2A each of 1.2V and 2.5V power is supplied to operate an FPGA´s core voltages. The analog and digital grounds are tied together via 6A ferrite bead. The analog voltages can be used for digital purposes if desired.

When installed in a PXI chassis the system clock and triggers may be available. PXI_TRIG0 - PXI_TRIG7, PXI_CLK10, and PXI_STAR are routed from J2 to the mezzanine control connector.

JTAG programming can be used to update FLASH on the mezzanine card. A header mounted to the DartBase is routed to the mezzanine connector. In addition the control and programming lines are tied between a port on the local FPGA and programming port on the mezzanine FPGA to allow reprogramming on-the-fly. The DartBase design has the logic and the Driver supports reprogramming the mezzanine FPGA for reprogrammability. A handy feature for development and field based updates. Please note: the target FPGA is a Spartan family part. DartBase may need to be updated to support an Altera based design in this manner.

In PCI based systems the address of the installed cards is unknown until run time. With multiple cards of the same type in a system SW designers run the risk of controlling the wrong assets or making decisions based on the wrong input. The DartBase design includes a simple remedy. An octal switch is provided for positive identification of an individual card in a multi-card environment. The driver for the card can read the switch and allow the application software to make a positive association between a specific card and its "handle".

Many times you need more than one port of the same type, or several different ports on the same card. There are 8 channels designed into the DartBase structure to allow for up to 8 devices [same or different] to be directly controlled and with individual DMA capability. The DartBase design includes the DMA arbitration and memory elements to support DMA access or standard R/W access on each channel. In addition there is a control link which can be used to do top level set-up and control. As an example you can put 8 SDLC ports on the mezzanine each with DMA transmit and DMA receive support. Each channel can operate independently with the DartBase architecture. The first mezzanine developed has 8 channels of Analog circuitry to stimulate and read-back data for a biometrics application.

The DartBase design is intended to be flexible allowing for a variety of connectors at the bezel, types of IO implemented etc. The Bezel for DartBase is designed to accomodate wider connectors than on PMC and other standard mezzanine cards.

"Zero Slot fans"™ can be installed to provide direct cooling to the main component side of the installed mezzanine. The fans provide approximately 5 CFM each.

The single width PMC specification is for 149x74 mm [5.866" x 2.91"] with area lost for 4 PMC connectors and 2 voltage keying holes. The DartBase design uses LVDS channels to communicate between the mezzanine and the Base allowing 8 channels plus the control channel to reside in one connector. Power is through a second connector. Since LVDS levels are defined there is no need for voltage keying holes. The area of the Dart Mezzanine has been expanded to be 6.293" x 3.7". The added area coupled with the reduced connectors and holes provides for more usable space. In addition the connector mounting positions are set to allow the FPGA to be mounted below the connectors and the IO above. This configuration allows for better performance with mixed analog and digital circuitry.

To make integration easy an engineering kit is available. The engineering kit includes a PAD´s compatible project to help ensure your mezzanine fits properly. If you choose to use one of our standard mezzanines you can get the VHDL for it to allow you to make changes for your project. A windows® driver is also part of the engineering kit. Linux is available upon request. The driver makes accomodations for user defined registers - for when you do your own project and do not want to write your own driver.

Frequently clients ask Dynamic Engineering to do the initial programming for their project and then deliver a custom engineering kit with the initial implementation of the mezzanine, custom driver and manuals to them. In this state the client can do the maintenance or add features while taking advantage of Dynamic Engineering´s expertise and familiarity with cPCI-DartBase. Dartmouth worked with Dynamic Engineering to develop the "DartBoard" depicted in the combined block diagram.

cPCI-DartBase Block Diagram



cPCI-DartBase Features

  • Size
  • Standard 3U cPCI

  • System Interface
  • Standard 32/33 3V PCI interface supported. Channelized DMA supported on 8 bidirectional channels.

  • Mezzanine Interface
  • 8 high-speed full duplex serial links to support 8 channels plus "back door" control bus for setting up mezzanine registers etc. 2.5V differential levels based on Xilinx FPGA. Recommend Spartan III or "higher" performance device for the mezzanine interface.

  • Memory
  • 1Kx32 FIFO per Channel Direction to support DMA [16 total].

  • PXI
  • The PXI timing signals are routed from J2 to the mezzanine position. It is optional to the mezzanine whether the PXI Timing signals are used.

  • Power Supplies
  • Multiple voltages are supported: 1.2V, 2.5V, 3.3V, 5V, 6V, -6V, 12V, -12V are supplied to the mezzanine position. With a Xilinx FPGA implemented on the mezzanine, the standard core and IO voltages are available without needing a local power supply. Several of the voltages have analog and digital versions available at the mezzanine power connector.

  • FAN
  • 2 "Zero Slot fans"™ can be installed to provide direct cooling to the main component side of the installed mezzanine.

  • JTAG
  • A header is provided with the standard JTAG signals routed to the mezzaine IO connector. This connector can be used to reprogram FLASH etc. located on the mezzanine card. In addition the FPGA on the mezzanine [Xilinx] can be reprogramed via DartBase card. This is handy for development or field upgrades.

  • Bezel
  • cPCI-DartBase is outfitted with a 3U bezel. The bezel has a large cutout to allow for connectors mounted to the installed Mezzanine.

  • Software Interface
  • Windows® drivers are available with DMA support, register control, and mezzanine IO control. Linux available upon request. "DartBoard" mezzanine support included plus user defined spaces for each channel.

  • DIP switch
  • An 8 position switch is attached to the base FPGA to allow for configuration control, addressing multiple cards, or to facilitate debugging.


  • Classified and Company Proprietary Designs
  • Since the mezzanine contains all of the "personality" for your sensitive design - Dynamic Engineering can help out by providing a starting point or completed design based on a sanitized requirement and you can put on the finishing touches or provide maintenance upgrades in the future.




    cPCI-DartBase Benefits

  • Speed
  • cPCI-DartBase is optimized for IO interfacing requirements. The FIFO memories and programmable interrupts off-load the CPU from most of the management. Independent DMA channels further reduce CPU overhead when multiple streams are in use. FIFO access is optimized for the PCI bus further reducing overhead by speeding up the data transfer. IO is provided by the mezzanine allowing for all possibilities.

  • Price
  • cPCI-DartBase is available off-the-shelf at a reasonable price. Custom versions can also be arranged. cPCI-DartBase supports the mezzanine with power, control and data path support, DMA and local channel arbitration, allowing the mezzanine to be optimized for your requirements. Since the PCI bus is handled and drivers are available your integration cost will be lower. Previously implemented "custom designs" are available without the costs of schematic level design, layout, debugging etc. When a new Mezzanine is required for your application we can draw upon our man-years of experience to create a custom implementation at an attractive price.

  • Ease of Use
  • cPCI-DartBase is easy to use. DartBase is basically auto-configuring with very little set-up required. With the PCI interface along with channelized DMA incorporated into the DartBase, the user interface on the mezzanine is much less complex. Dynamic Engineering can provide a complete solution including the mezzanine or support to allow you to develop your own. PAD´s layout files, reference VHDL, reference schematics etc. are available to support your design effort.

  • Availability
  • Dynamic Engineering works to keep the cPCI-DartBase in stock. Send in your order and in most cases have your hardware the next day. With a custom design [mezzanine or changes to the DartBase] a few week design period is usually required. The manuals are located at the bottom of this page.

  • Size
  • cPCI-DartBase is a standard single width 3U cPCI card and meets the cPCI mechanical specifications.

  • cPCI Compatibility
  • cPCI-DartBase is cPCI compliant per the cPCI specification.

  • PCI Compatibility
  • cPCI-DartBase is PCI compliant.



    Ordering Information
    1 year warranty
    Quantity discounts available

    cPCI-DartBase - Standard version
    -ROHS - Add ROHS processing - standard is leaded solder
    -CC - Add conformal coating to board

    Engineering Kits
    Dynamic Engineering provides Engineering Kits to help our customers have a successful and quick integration. Engineering Kits will save time and money with decreased T&I. We recognize that different customers have different needs. The Engineering Kits are standardized in description to help with selection. The kits are segmented to allow for customers who only need hardware support, software support or a mixture. The Engineering Kit is highly recommended for first time buyers. The kit pricing is discounted to encourage their use.

    cPCI-DartBase-Eng-1 .......... Hardware Support Engineering Kit includes:
    Board level reference Schematic [PDF] for mezzanine interface, VHDL base design for Mezzanine, PAD's mezzanine placement start board, bezel outline drawing.

    cPCI-DartBase-Eng-2 .......... Hardware Support plus Driver Engineering Kit includes:
    Board level reference Schematic [PDF] for mezzanine interface, VHDL base design for Mezzanine, PAD's mezzanine placement start board, bezel outline drawing plus Window® XP and 2000 compliant drivers

    cPCI-DartBase Drivers.......... Software Support Only Windows®XP and 2000 compliant drivers for the cPCI-DartBase:
    Driver and user application.



    Manuals
    You must have Adobe Acrobat to read our PDF files.

    cPCI-DartBase Hardware Manual Hardware level design description, bit maps, pinouts, operation etc. Includes definitions for Dynamic Engineering designed Mezzanines.
    cPCI-DartBase Software Manual User Driver manual for installation and use with API for Dynamic Engineering designed Mezzanines.


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