Table of Contents
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Chapter 2
•
Interrupt Circuitry
•
Parity Check and Generation
•
A32, A24, A16 and LA Windows
•
VXI-MXI Configuration Registers
•
MXIbus Master Mode State Machine
•
MXIbus Slave Mode State Machine
•
MXIbus Address/Data and Address
Modifiers Transceivers
•
MXIbus System Controller Functions
•
MXIbus Control Signals Transceivers
•
MXIbus Requester and Arbiter Circuitry This circuitry is used to request the MXIbus when
•
Daughter Card Connection
© National Instruments Corporation
This circuitry generates and receives interrupt
requests on the VMEbus, the MXIbus, and on
boards plugged into the daughter card connectors.
Interrupt requests routed between VXIbus
mainframes can be transparently serviced by
interrupt handlers in VXIbus mainframes other
than the requester's own mainframe.
This circuitry checks and generates MXIbus
parity.
These address windows assign portions of the
MXIbus address space to the VXIbus mainframe
and vice versa.
These registers provide all the configuration
information required by the VXI-MXI and are
accessible from both the VXIbus and the MXIbus.
This state machine converts VXIbus cycles
mapped out of a MXIbus window to the MXIbus
into MXIbus cycles.
This state machine converts MXIbus cycles
mapped through a MXIbus window into the
VXIbus mainframe into VXIbus cycles.
These transceivers and associated circuitry control
the direction of the MXIbus address and data
lines. When a VXIbus transfer is mapped out to
the MXIbus, the VXIbus address/data lines are
multiplexed into the MXIbus address/data lines.
When a MXIbus transfer is mapped into the
VXIbus, the MXIbus address/data lines are
demultiplexed into separate VXIbus address and
data lines.
If the VXI-MXI is the MXIbus System Controller,
this circuitry provides the MXIbus arbiter,
interrupt daisy-chain generation, and the MXIbus
System Controller timeout logic.
These transceivers control the direction of the
MXIbus control signals.
a VXIbus transfer is mapped into a MXIbus
window.
The two daughter card connectors can be used to
add additional functionality to the VXI-MXI in
the form of plug-in daughter cards.
2-7
General Description
VXI-MXI User Manual
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