National Instruments PCI-1200 Manual De Usuario

© National Instruments Corporation

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Digital I/O circuitry

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Calibration circuitry

The internal data and control buses interconnect the components. The rest 
of this chapter explains the theory of operation of each of the PCI-1200 
components. Calibration circuitry is discussed in Chapter 5, 

The PCI-1200 interface circuitry consists of the MITE PCI interface chip 
and a digital control logic chip. The MITE PCI interface chip provides a 
mechanism for the PCI-1200 to communicate with the PCI bus. It is an 
Application Specific Integrated Circuit (ASIC) designed by National 
Instruments specifically for data acquisition. The digital control logic 
chip connects the MITE PCI interface chip with the rest of the board. 
The PCI-1200 is fully compliant with PCI Local Bus Specification, 
Revision 2.0. Therefore, the base memory address and interrupt level for 
the board are stored inside the MITE PCI interface chip at power on. You 
do not need to set any switches or jumpers. The PCI bus is capable of 8-bit, 
16-bit, or 32-bit transfers, but the PCI-1200 uses only 8-bit transfers.

Figure 4-2.  PCI Interface Circuitry

PCI Bus

Digital

Control

Logic

MITE

PCI

Interface

Chip

Data/Address

Interface Control

Error Reporting

Arbitration

System

Interrupt

1

2

2

2

6

37

Address

Data

Control

Interrupt

1

DRQ

1

Control/Data

4

8

5