Chapter 4 Theory of Operation
PCI-DIO-96 User Manual 4-2
©
National Instruments Corporation

Figure 4-1. PCI-DIO-96 Block Diagram

PCI Interface Circuitry

The PCI-DIO-96 uses the MITE ASIC to communicate with the PCI

bus. The MITE ASIC was designed by National Instruments

specifically for data acquisition. The PCI-DIO-96 is fully compliant

with Local Bus Specification 2.0.

The base memory address and interrupt level for the board are stored

inside the MITE at power on. You do not need to set any switches or

jumpers.

I/O Connector
Interrupt
Control
Circuitry
Port A
Port B
Port C
Port A
Port B
Port C
Port A
Port B
Port C
Port A
Port B
Port C
8
8
8
8
8
8
8
8
8
8
8
8
MITE
PCI
Interface
Circuitry
Interrupt
1
Data
Bus
Interrupt
Bus
Interrupt
PCI
1 A Fuse
+5 VDC
System
2
Arbitration
2
Error Reporting
2
Interface Control
6
Data/Address
37
82C53
Timer
82C55A
PPI C
82C55A
PPI D
82C55A
PPI B
82C55A
PPI A