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 HP E1418A requires 256 kbytes of A24 address
space.
Model Codes: The model codes for the HP 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
13
12
11
10
09
08
07
06
05
04
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
129 HP E1418A Register-Based Programming
Appendix B
Summary of Contents for E1418A
Page 6: ...Notes 6 Contents HP E1418A 8 16 Channel D A Converter Module ...
Page 10: ...Notes 10 HP E1418A User s Manual ...
Page 12: ...12 HP E1418A User s Manual ...
Page 105: ...TRIGger 105 HP E1418A SCPI Command Reference Chapter 3 ...
Page 111: ...Notes HP E1418A Command Quick Reference 111 HP E1418A SCPI Command Reference Chapter 3 ...
Page 135: ...135 HP E1418A Register Based Programming Appendix B ...
Page 157: ...Notes 156 HP E1418A Error Messages Appendix C ...
Page 170: ...Notes Appendix D Voltage Current Output Adjustment 169 ...
Page 174: ...Figure E 1 8 Channel Disassembly 172 Configuration and Disassembly Appendix E ...
Page 175: ...Figure E 2 16 Channel Disassembly Appendix E Configuration and Disassembly 173 ...
Page 192: ...Notes 192 HP E1418A 8 16 Channel D A Converter Module Index ...