Registers Format
•
19
ASCAN: Auto Scan Control
0: Auto Scan OFF
1: Auto Scan ON
Only the modes listed below can be applied on the PCI-9111 card:
Bit 3
PTRG
Bit 2
EITS
Bit 1
TPST
Bit 0
ASCAN
Mode Description
0/1
0
0
0/1
Software Trigger & Polling
0/1
0
1
0/1
Timer Pacer Trigger
0/1
1
X
0/1
External Trigger
Note:
The bits in this register can only control the A/D trigger source
and trigger method. The trigger conditions are independent
from data transfer method and interrupt generation.
3.9 Software Trigger Register
To generate a trigger pulse to the PCI-9111 for A/D conversion, you just
write any data to this register, and then the A/D converter will be triggered.
Address: BASE + 0Eh
Attribute:
write only
Data Format:
Bit
7
6
5
4
3
2
1
0
BASE+0Eh
X
X
X
X
X
X
X
X
3.10 Interrupt Control Register
The PCI-9111 has dual interrupt systems and two interrupt sources can
be generated and be checked by the software. This register is used to
select the interrupt sources.
Address: BASE + 0Ch
Attribute:
write only
Data Format:
Bit
7
6
5
4
3
2
1
0
BASE+0Ch
X
X
X
X
X
FFEN
ISC1
ISC0
ISC0:
IRQ0 signal select
0: IRQ on the ending of the AD conversion (EOC)
1: IRQ when FIFO is half full
ISC1:
IRQ1 signal select
Summary of Contents for NuDAQ PCI-9111DG
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