Vxibus Status/Control Register - National Instruments VXI-MXI User Manual

Chapter 4

VXIbus Status/Control Register

VXIbus Address:
Attributes:
15 14
1 MODID*
0
0
6
7
VERSION
0 0
This register provides status information about this VXIbus device and provides a bit to force the
VXI-MXI into a Soft Reset state. The RESET bit is cleared on a hard reset. Hard and soft resets
have no effect on the other bits on this register.
Bit Mnemonic
15r/w, 1
14-10w,
9r/w, 8w,
7-2w, 1r/w
14r MODID*
13-10r EDTYPE
8r ACCDIR
© National Instruments Corporation
Base Address + 4 (hex)
Read/Write
13 12
EDTYPE
0 0
5 4
0 0
Description
Reserved Bits
These bits are reserved and read back as ones. Write a zero when
writing to these bits.
MODID Line Status Bit
This bit is zero when the device is selected by the MODID line,
and one when the device is not selected by the MODID line. This
bit is read only.
Extended Device Type Class Bits
These bits are driven low by an optional daughter card installed on
the two 96-pin daughter card connectors. They identify the
daughter card and its capabilities. When a daughter card is not
installed, these bits are all ones. The INTX daughter card has been
assigned extended device type class hex E; therefore, when the
VXI-MXI includes this option, these bits are hex E. These bits are
read only.
Access Direction Bit
When this bit is one, the current access to the Status register
originated from a device on the MXIbus. When this bit is zero, the
current access to the Status register originated from a device on the
VMEbus. This bit is read only.
11 10
0 0
3 2
RDY PASS
0
0
4-7
Register Descriptions
9 8
R
1 ACCDIR
0 0
W
1 0
R
RESET
1
0 RESET
W
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