Omega 1002 Manual De Usuario

 
•  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 

 
 
 
 
 
 
 
 
 
 
 
 
 
 Figure 1-3. Programmable interrupt source. 

A/D busy 

IRQ 

End of Conversion

 

1. 

Pacer 0 

IRQ 

Falling edge of Pacer 0

 

2.

Pacer 1 

IRQ 

Falling edge of Pacer 1

3. 

External 

Trigger 

IRQ 

Falling edge of 

External trigger

 

4.

 
 
 
 

 
•  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.