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> National instruments ni 181045-02 vxi-mxi module
National instruments ni 181045-02 vxi-mxi module
* Model: VXI-MXI Enhanced VXI-MXI Interface Module w/INTX
The VXI-MXI interface is a C-size extended class mainframe extender for the VXIbus (VMEbusExtensions for Instrumentation). It extends the VXIbus architecture outside a VXIbusmainframe via the MXIbus (Multisystem Extension Interface bus). A VXIbus mainframeequipped with a VXI-MXI can be transparently connected to other MXIbus devices such as otherVXIbus mainframes, MXIbus instruments, or MXIbus-equipped personal computers. TheVXI-MXI interface module uses address mapping to transparently translate bus cycles on theVXIbus system bus (VMEbus) to the MXIbus and vice versa.
The VXI-MXI is an extended class Register-Based VXIbus device with optional Slot 0 capabilityso that it can reside in any slot in a C-size or D-size VXIbus chassis. The VXI-MXI convertsA32, A24, A16, D32, D16, and D08(EO) VXIbus bus cycles into MXIbus bus cycles and vice versa. The VXI-MXI has four address windows that map into and out of the VXIbus mainframe.These four windows represent the three VMEbus address spaces (A32, A24, and A16) plus a dedicated window for mapping the VXIbus configuration space (the upper 16 kilobytes of A16 space).
The MXIbus is a multidrop system bus that connects multiple devices at the hardware bus level in a software-transparent manner. Multiple VXIbus mainframes with VXI-MXI interfaces can be connected to form a single multiframe VXIbus system. An external PC with a MXIbus interface can also be connected to a VXIbus mainframe with a VXI-MXI. This configuration makes the PC appear to be embedded on a VXIbus module that is plugged into the VXIbus mainframe.
The VXI-MXI has the following features:
* Interfaces the VXIbus to the MXIbus (32-bit Multisystem eXtension Interface bus)
* Extends VXIbus to multiple mainframes, external MXIbus-equipped instruments, and external MXIbus-equipped personal computers (PCs)
* Allows multiple VXIbus mainframes to appear as a single VXIbus system
* Provides integrated block mode for high-performance data transfers
* Supports dynamic configuration of VXIbus devices
* Provides optional interlocked bus operation for prevention of deadlock conditions
* Includes daughter card connector scheme giving additional functionality for optional daughter cards
* Is fully compatible with VXIbus and MXIbus specifications
* Has no restrictions on Commander/Servant hierarchy or physical location of devices
The VXI-MXI generates all the support signals required by the VMEbus:
* VMEbus System Controller functions:
* 16 MHz system clock driver
* Data transfer bus arbiter (PRI ARBITER)
* Interrupt acknowledge daisy-chain driver
* Pushbutton system reset switch
* VMEbus master capabilities:
* Access to A16, A24, and A32 address space
* D08(EO), D16, and D32 accesses
* Release-on-Request bus requester (jumper-selectable arbitration level)
* A16, A24, and A32 address space
* D08(EO), D16, and D32 accesses
* TTL and ECL Trigger line suppor
All integrated circuit drivers and receivers used on the VXI-MXI meet the requirements of both the VMEbus specification and the MXIbus specification.
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