Interrupt Channel; Programmable Timer/Counter - ICP DAS USA PCI-1002L User Manual

PCI-1002 Series Card
12-bit, 110 kS/s or 44 kS/s Multi-function Board

1.2.5 Interrupt Channel

Interrupt: INTA (Automatically assigned by PCI-initiator).

Enable/Disable: Via PCI control register and add-on control register.

Interrupt source: (Selected by on-board control register)

1. AD conversion interrupt.
2. Pacer 0 interrupt (Timer 0).
3. Pacer 1 interrupt (Timer 1).
4. External interrupt.
1.
End of Conversion
AD busy
IRQ
3.
Falling edge of Pacer 1
Pacer 1
IRQ
Figure 1-2: Programmable interrupt source.

1.2.6 Programmable Timer/Counter

Type: 82C54 – 8 programmable timer/counter.

Timers:

• Timer 0 for Pacer triggers and interrupts.
Timer 1 for External trigger and interrupt.
•
Timer 2 for software machine independent timer.
•
2.
Falling edge of Pacer 0
Pacer 0
IRQ
4.
Falling edge of
External
Trigger
IRQ
User Manual, Ver. 3.0, Jun. 2018, PMH-015-30, Page: 9