
38
Register Descriptions
VXI Status/Control
Register
The Status/Control Register is a read/write register (address 04
h
) that
controls the module and indicates its status.
•
A24 Enable. A 1 in this bit means access to the devices A24 registers
is enabled.
•
Sysfail Inhibit. Writing a 1 disables the M-Module from driving the
SYSFAIL* line.
•
Reset. Writing a 1 then a 0 to this bit forces the M-Module to reset.
•
A24 Active. A 1 in this bit indicates the M-Module’s registers in A24
memory space can be accessed. Default = 1.
•
MODID*. A 1 in this bit indicates that the M-Module is not selected
via the P2 MODID line. A 0 indicates the M-Modules is selected by a
high state on the P2 MODID line.
•
Ready. A 1 in this bit indicates that the M-Module is ready to accept
commands. A 0 indicates the M-Module is busy and not ready to
accept commands.
•
Passed. A 1 in this bit indicates the M-Module passed its self test
successfully. A 0 indicates the M-Module is either executing or has
failed its self test.
VXI Offset Register
The Offset Register (address 06
h
) contains the value of the base address for
accessing registers in the A24 address space.
b+04
h
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Write
(Control)
A24
Enable
Reserved
Sysfail
Inhibit
Reset
Read
(Status)
A24
Active
MODID*
M-Module Device Dependent
Ready
Passed
Device Dependent
b+06
h
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Write
Register written to by VXI Resource Manager. Do not attempt to write to this register.
Read
A24 Space Base address for those M-Modules needing A24 memory
Summary of Contents for E2259A
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Page 5: ...2 Contents Appendix A Agilent E2259A Specifications 45 ...
Page 9: ...6 Notes ...
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