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

Chapter 4

Interrupt Status/Control Register

VXIbus Address:
Attributes:
15 14
LINT3 LINT2
LINT2
LINT3
7 6
SYSFAILINT IRQ7
0
DIRQ7
This register is used to configure local interrupts, drive the VMEbus IRQ lines individually, and
reflect the status of the VMEbus IRQ lines. The upper byte (bits 15 through 8) of this register is
cleared on a hard reset. The lower byte (bits 7 through 0) is cleared on hard and soft resets.
Bit Mnemonic
15-13r/w LINT[3-1]
© National Instruments Corporation
Base Address + 2A (hex)
Read/Write
13 12
LINT1
ACFAILINT
LINT1 0
5 4
IRQ6 IRQ5
DIRQ6 DIRQ5
Description
Local Interrupt Line Bits
These bits select the VMEbus interrupt request line onto which the
local VXI-MXI interrupts are routed. The local interrupts are
BKOFF, TRIGINT, ACFAIL, and SYSFAIL.
LINT3 LINT2 LINT1
0
0
0
0
1
1
1
1
11 10
TRIGINT
BKOFF
BKOFFIE TRIGINTIE SYSFAILIE ACFAILIE
3 2
IRQ4 IRQ3
DIRQ3
DIRQ4
VMEbus Interrupt Request Line
0 0 Local Interrupt Disabled
0 1 Interrupt Request Line 1
1 0 Interrupt Request Line 2
1 1 Interrupt Request Line 3
0 0 Interrupt Request Line 4
0 1 Interrupt Request Line 5
1 0 Interrupt Request Line 6
1 1 Interrupt Request Line 7
4-45
Register Descriptions
9 8
R
ACFAIL
SYSFAIL
W
1 0
R
IRQ2 IRQ1
DIRQ2 DIRQ1
W
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