HP (Hewlett-Packard) PCI-9111DG/HR Manual De Usuario
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Registers Format
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.
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.
write any data to this register, and then the A/D converter will be triggered.
Address: BASE + 0Eh
Attribute: write only
Data Format:
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.
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:
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)