Figure B-1. Interrupt Control Circuitry Block Diagram - National Instruments PCI-DIO-96 User Manual

Appendix B
The block diagram in Figure B-1 illustrates the interrupt control circuitry.
2 MHz
PCI-DIO-96/PXI-6508 Only
© National Instruments Corporation
Register-Level Programming — 82C53 Programmable Interval Timer (PCI-DIO-96, PXI-6508 Only)
82C53
Counter/Timer
CLK0
+5 V OUT0
GATE0
CLK1
+5 V OUT1
GATE1
CLK2
OUT2
GATE2
82C55A
PPI A
82C55A
PPI B
82C55A
PPI C
82C55A
PPI D

Figure B-1. Interrupt Control Circuitry Block Diagram

PC3
Interrupt
PC0
Circuitry
PC3
PC0
PC3
PC0
PC3
PC0
Interrupt Control Registers
B-3 PCI-DIO-96/PXI-6508/PCI-6503 User Manual
PCI
Interrupt
Control