General Purpose 6U size CompactPCI Interface Card
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The SyCPCI-M4 is a general purpose 6U size CompactPCI interface card that can accommodate up to four dedicated interface modules. A 3U size variant is also available that can accommodate up to two modules (SyCPCI-M2).
Typical modules include interfaces to ARINC-429, ARINC-629 and RS-422. Each module can be designed to support up to 16 Rx or 16 Tx channels.
The card provides configuration registers that allow the host to:
Automatically identify the SyCPCI-M4 card and its revision status.
Automatically identify which, if any, modules are fitted to the base card and their revision status
Identify connector cables connected to the card
Assign address space for the card's data buffer memory and registers. (Plug-in and Play).
Control and monitor the PCI bus interface to the card.
Read card interrupt configuration as assigned by the POST software as it initialises and configures the system.
The card supports the resident interface modules with:
64 Cyclic Data Buffers, each with a capacity for 1k x 4 byte words
Each module may have up to 16 channels, each with its own Cyclic Data Buffer
Direct access to the Cyclic Data Buffer Read / Write Pointers
PCI interrupts on Module Events
Direct access to Module registers and application memory
Interface compatible with PCI Local bus Specification, revision 2.1, June 1995
The card is designed to be used in a "Plug-in and Play" environment which is made possible, not only by the choice of CompactPCI interface, but also by the provision of various identification and module present registers. These include:
Subsystem Vendor ID
Connector ID / Present
Using these registers the host can detect the presence of the card, its resident modules and its connector, determine if this is consistent with system requirements and respond accordingly by configuring the system or reporting system deficiencies. The cards do not require any specific hardware configuration other than fitting the correct modules and connectors. Any errors in the fitting of Modules and connectors can easily be detected by the software and appropriate warnings reported.
Cyclic Data Buffers:
The SyCPCI-M4 card provides high speed CompactPCI interfacing to 64 Cyclic Data buffers, sixteen of which are available for each resident module.
Each channel associated with a module is automatically assigned to be either a Tx Channel or a Rx Channel.
The user is free to read and write to any of the Cyclic Buffers independent of their type (Tx or Rx). However, the Cyclic Buffer data transfer system only responds in strict accordance to the channel type. That is it will transfer data, written to a Tx Cyclic Buffer, to the appropriate module channel and write received data to the corresponding Rx Cyclic Buffer.
The Cyclic Buffers are controlled according to simple rules. The buffer read and write pointers can be read by the host to assist in the data transfer process.
In practice, the user writes data for transmission to consecutive long word locations in the Cyclic Buffer. Only valid bytes are transmitted.
Receive data is automatically written to consecutive byte locations in the cyclic buffer.
PCI interrupts can be generated for both DMA and Module events. Interrupt Control and status registers are provided for enabling interrupts and determining which events occur.
Separate user manuals are provided for each module. Modules have a maximum of 16 channels that can be used for either transmission or reception of data. Modules may also have registers and memory accessible to the user. Access to this register and memory address space is relatively slow compared with that of the Cyclic Buffers and is therefore only intended for configuration and control purposes.
Ordering Information, Variants & Modules:
General Purpose 6U size CompactPCI interface supporting 64 channels
General Purpose 3U size CompactPCI interface supporting 32 channels
ARINC-429 Module with 8 Tx and 8 Rx channels
ARINC 429 Module with 16Rx channels
ARINC 429 Module with 16Tx channels
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