Software trigger register, Trigger control register – HP E1418A User Manual
Page 132
Software Trigger
Register
The Software Trigger Register provides a means to trigger the module when
software trigger has been selected as the trigger source in the Trigger
Control Register.
Address
Base + 0C
16
Bit
15
14
13
12
11
10
09
08
07
06
05
04
03
02
01
00
WRITE
Software Trigger
Software Trigger: When software trigger is selected as the trigger source
in the Trigger Control Register, any write to this register generates the
trigger (the value written is not important).
Trigger Control
Register
The Trigger Control Register selects the sources, destinations, and modes
used to synchronize channels programmed for triggered operation.
Address
Base + 0E
16
Bit
15
14
13
12
11
10
09
08
07
06
05
04
03
02
01
00
READ
Trig
Syst En
Unused
Trigger Out
Trigger
Mode
Trigger Source
WRITE
Trig Syst En: Writing a one (1) to this field enables the trigger system.
Writing a zero (0) disables the trigger system.
Trigger Out: This field selects which VXIbus trigger line will be driven when
the trigger mode is set to Output. The trigger lines selected are shown below.
Line Out Selected
Bits
08
07
06
TTLTRIG0*
0
0
0
TTLTRIG1*
0
0
1
TTLTRIG2*
0
1
0
TTLTRIG3*
0
1
1
TTLTRIG4*
1
0
0
TTLTRIG5*
1
0
1
TTLTRIG6*
1
1
0
TTLTRIG7*
1
1
1
Trigger Mode: This field selects the operating mode for trigger-enabled
channels.
Trigger Mode
Bits
05
04
SYNC
0
0
OUTPUT
1
1
Appendix B
HP E1418A Register-Based Programming 131
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