Omega 1002 manual Interrupt Channel, Programmable Timer/Counter

1.4.5 Interrupt Channel

• Interrupt: INTA (Automatically assigned by PCI-controller).

•Enable/Disable: Via PCI control register and add-on control register.

•Interrupt source: (Selected by on-board control register)

1.A/D conversion interrupt

2.Pacer 0 interrupt (Timer 0)

3.Pacer 1 interrupt (Timer 1)

4.External interrupt

1.End of Conversion

A/D busy

IRQ

3.
		Falling edge of Pacer 1
	Pacer 1

IRQ

2.

Pacer 0

IRQ

4.

External

Trigger

IRQ

Falling edge of Pacer 0

Falling edge of

External trigger

Figure 1-3. Programmable interrupt source.

1.4.6 Programmable Timer/Counter

•Type: 82C54-8 programmable timer/counter.

•Timers:

1.Timer 0 for Pacer trigger and interrupt

2.Timer 1 for External trigger and interrupt

3.Timer 2 for software machine independent timer

•Input Clock: 4 MHz.

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