National Instruments AT-DIO-32F, Руководство пользователя

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Configuration and Installation Chapter 2
AT-DIO-32F User Manual 2-10 © National Instruments Corporation
If you do not want to use interrupts, place the jumper on W2 in the positions shown in Figure 2-
7. This setting disables the AT-DIO-32F from asserting any interrupt lines on the PC I/O
channel.
IRQ
INTR1
INTR2
• • • • • • • • • •
• • • • • • • • • • •
• • • • • • • • •
W2
3 4 5 6 7 9 11 12 14 15 10
Figure 2-7. Interrupt Jumper Settings for Disabling Interrupts
Figure 2-8 shows the Group 2 interrupts disabled, and interrupt line 5 is selected for Group 1.
IRQ
INTR1
INTR2
• • • • • • •
• •
• • • • • • •
• • • • • • •
•
• • •
•
•
W2
3 4 5 6 7 10 9 11 12 14 15
Figure 2-8. Interrupt Jumper Setting IRQ5 Only
RTSI Bus Clock Selection
When multiple AT Series boards are connected via the RTSI bus, you may want to have all the
boards use the same 10-MHz clock. This arrangement is useful for applications that require
counter/timer synchronization between boards. Each AT Series board with a RTSI bus interface
has an onboard oscillator. Thus, one board can drive the RTSI bus clock signal, and the other
boards can receive this signal or disconnect from it.
The configuration for jumper W3 determines whether a board drives the onboard 10-MHz clock
onto the RTSI bus, receives the RTSI bus clock, or disconnects from the RTSI bus clock. This
clock source, whether a local or RTSI signal, is then used as the onboard counter frequency
source.
The jumper selections are shown in Table 2-5.