User`s manual

will not be accessible via MODID. The content of this register is compared
with address lines 6 through 13 from the backplane to determine module
accesses in A16 space.
Note Writes to this register can be made at any time and will change the logical
address of the module for later accesses.
Device Type
Register
The Device Type Register is a VXIbus required register. This register
indicates the module’s configuration as either an 8-channel DAC or a
16-channel DAC. A read of this register returns 5230
16
(21040 decimal) if
the module is configured as a 16-channel DAC, or 5237
16
(21047 decimal)
if the module is configured as an 8-channel DAC.
Address
Base + 02
16
Bit Position 15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00
Setting 5
16
230
16
or 237
16
READ Required Memory Model Codes
Required Memory: The Agilent E1418A requires 256 kbytes of A24
address space.
Model Codes: The model codes for the Agilent E1418A are shown in the
table below.
Configuration Model-Code
Value
Register Read
Value
16-channel DAC 230
16
5230
16
8-channel DAC 237
16
5237
16
VXI Status/Control
Register
The VXI Status/Control Register is a VXIbus required register. As a READ
register, the value returned indicates the status of A24 memory access, the
MODID* line, and module readiness. As a WRITE register, the value
written can control the state of the A24 memory access, the control of the
VXIbus SYSFAIL* line, and perform a module reset.
Address
Base + 04
16
Bit 15 14 13121110090807060504 03 02 01 00
READ A24
ACT
MODID* Unused Ready Passed Unused
WRITE A24
EN
Unused SYSINH RESET
READ A24 ACT: A one (1) in this field indicates that A24 memory can be
accessed (is active) via A24 addressing. A zero (0) indicates that A24
Appendix B Agilent E1418A Register-Based Programming 127