National Instruments VXI-MXI User Manual page 91

Chapter 4
11r MXSCTO
11w ECL0EN
10r INTLCK
10w ECL0DIR
9r/w DSYSFAIL
© National Instruments Corporation
MXIbus System Controller Timeout Status Bit
If this VXI-MXI is the MXIbus System Controller, this bit is set if
the VXI-MXI sent a MXIbus BERR on the last MXIbus transfer in
response to a MXIbus System Controller Timeout. This bit is
cleared when this register is read and on hard and soft resets.
ECL Trigger 0 Enable Bit
Setting this bit enables the ECL Trigger line 0 to be mapped to the
Trigger Out SMB connector or from the Trigger In SMB connector
on the front panel, as specified by the ECL0DIR bit. Clearing this
bit disables the mapping of ECL Trigger Line 0 to the front panel
SMB connectors. This bit is cleared on a hard reset.
VXI-MXI Interlocked Bus Operation Status Bit
When this bit is set, the VXI-MXI is configured to operate in
interlocked bus mode. This mode of operation prevents deadlocks
by allowing only one master of the entire system (VXIbus and
MXIbus) at any given time. When this bit is cleared, the
VXI-MXI is configured to operate in normal mode. INTLCK is
selected with slide switch S3. This bit is not affected by hard or
soft resets.
ECL Trigger Line 0 Direction Bit
If the ECL0EN bit is clear, this bit has no meaning. If ECL0EN is
set, this bit controls the routing of ECL trigger line 0.
If this bit is set, ECL trigger line 0 is driven by the signal received
on the front panel Trigger In SMB connector. If this bit is clear,
ECL trigger line 0 is driven out of the mainframe through the
Trigger Out SMB on the front panel. This bit is cleared on a hard
reset.
ECLxEN ECLxDIR
0
1
Drive SYSFAIL Bit
When this bit is set, the VXI-MXI is driving the VXIbus SYSFAIL
line active. When this bit is cleared, the VXI-MXI is not asserting
the SYSFAIL line. This bit is cleared on hard and soft reset.
4-33
X Disabled
ECL Trigger Line X drives TRIG
0
OUT SMB
1 TRIG IN SMB drives ECL
Trigger Line X
Register Descriptions
Routing
VXI-MXI User Manual