User manual

Chapter 5 Register Descriptions
VXI-MXI-2 User Manual 5-26 © National Instruments Corporation
VXIbus Subclass Register (VSCR)
VXIbus Configuration Offset: 1E (hex)
Attributes: Read Only 16, 8-bit accessible
15 14 13 12 11 10 9 8
SC[15] SC[14] SC[13] SC[12] SC[11] SC[10] SC[9] SC[8]
76 54 321 0
SC[7] SC[6] SC[5] SC[4] SC[3] SC[2] SC[1] SC[0]
The Subclass Register (VSCR) is used to specify the precise class of a device when it
indicates with the DEVCLASS[1:0] bits in the VXIbus ID Register (VIDR) that it is an
Extended Class device. The VXI-MXI-2 is a VXIbus Mainframe Extender, which is one
of the VXIbus-defined Extended classes. This register contains the VXIbus Mainframe
Extender subclass code. This register conforms to the VXIbus Mainframe Extender
specification.
Bit Mnemonic Description
15-0 SC[15:0] Subclass
These read-only bits return FFFC (hex).