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

Bit 2

Bit 1

Bit 0

Mode Description

PTRG

EITS

TPST

ASCAN

 

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.

3.9Software 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

3.10Interrupt 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)

18 Registers Format

Page 28
Image 28
HP NuDAQ I-9111DG/HR manual Mode Description, Address Base + 0Eh Attribute write only Data Format Bit