VXi 320222-01 User Manual
Register Descriptions
Chapter 4
VXI-MXI User Manual
4-2
© National Instruments Corporation
Table 4-1. VXI-MXI Register Map
Register Name
Offset from Base
Type
Size
Address (Hex)
VXIbus ID Register
0
Read Only
16-bit
Device Type Register
2
Read Only
16-bit
VXIbus Status/Control Register
4
Read/Write
16-bit
MODID Register
8
Read/Write
16-bit
Logical Address Window Register
A
Read/Write
16-bit
A16 Window Map Register
C
Read/Write
16-bit
A24 Window Map Register
E
Read/Write
16-bit
A32 Window Map Register
10
Read/Write
16-bit
INTX Interrupt Configuration *
12
Read/Write
16-bit
INTX Trigger Configuration *
14
Read/Write
16-bit
INTX Utility Configuration *
18
Read/Write
16-bit
Subclass Register
1E
Read Only
16-bit
MXIbus Status/Control Register
20
Read/Write
16-bit
MXIbus Lock Register
22
Read/Write
16-bit
MXIbus IRQ Configuration Register
24
Read/Write
16-bit
Drive Triggers/Read LA Register
26
Read/Write
16-bit
Trigger Mode Selection Register
28
Read/Write
16-bit
Interrupt Status/Control Register
2A
Read/Write
16-bit
Status/ID Register
2C
Read/Write
16-bit
MXIbus Trigger Configuration Register
2E
Read/Write
16-bit
Trigger Sync. Acknowledge Register
34
Write Only
8-bit
Trigger Async. Acknowledge Register
36
Write Only
8-bit
Interrupt Acknowledge for IRQ1
32
Read Only
16-bit
Interrupt Acknowledge for IRQ2
34
Read Only
16-bit
Interrupt Acknowledge for IRQ3
36
Read Only
16-bit
Interrupt Acknowledge for IRQ4
38
Read Only
16-bit
Interrupt Acknowledge for IRQ5
3A
Read Only
16-bit
Interrupt Acknowledge for IRQ6
3C
Read Only
16-bit
Interrupt Acknowledge for IRQ7
3E
Read Only
16-bit
*
The three INTX registers at offsets 12, 14, and 18 are only available on VXI-MXIs with the
INTX daughter card option. On VXI-MXIs without the INTX option, the entire range
between offsets 12 and 1C (inclusive) is VXI-MXI Reserved Space.
INTX daughter card option. On VXI-MXIs without the INTX option, the entire range
between offsets 12 and 1C (inclusive) is VXI-MXI Reserved Space.