User manual

Chapter 5 Register Descriptions
VXI-MXI-2 User Manual 5-6 © National Instruments Corporation
VXIbus Status Register (VSR)
VXIbus Configuration Offset: 4 (hex)
Attributes: Read Only 32, 16, 8-bit accessible
15 14 13 12 11 10 9 8
A24/A32
ACTIVE
MODID* EDTYPE[3] EDTYPE[2] EDTYPE[1] EDTYPE[0] X ACCDIR
76 54 321 0
VERSION[3] VERSION[2] VERSION[1] VERSION[0] READY PASSED SFINH RESET
This register contains status information about the VXI-MXI-2. This register conforms to
the VXIbus specification. When accessed with a 32-bit cycle, the bits of this register
appear on bits 31 to 16 along with the VXIbus Offset Register (VOR) on bits 15 to 0.
Bit Mnemonic Description
15 A24/A32 ACTIVE A24/A32 Active
This bit reflects the state of the A24/A32
ENABLE bit in the VXIbus Control Register
(VCR). A 1 indicates that the local A24/A32
registers and memory can be accessed.
14 MODID* MODID Line Status
This bit returns the status of the VXI-MXI-2
MODID line. A 0 indicates the VXI-MXI-2 is
being selected (the MODID line is active).
13-10 EDTYPE[3:0] Extended Device Type Class
These bits provide information about the
additional capabilities of the VXI-MXI-2 as
determined by optional configurations or
daughter boards. These bits return E (hex) on the
standard VXI-MXI-2 and are not affected by
hard or soft resets.
9 X Reserved
This is a reserved bit. The value it returns is
meaningless.