© National Instruments Corporation 4-1 PCI-1200 User Manual
4
Theory of Operation

This chapter explains the operation of each functional unit of the PCI-1200.

Functional Overview

The block diagram in Figure4-1 shows a functional overview of the

PCI-1200 board.

Figure 4-1. PCI-1200 Block Diagram

The major components of the PCI-1200 are as follows:

•MITE PCI interface circuitry

•Timing circuitry

•Analog input circuitry

•Analog output circuitry

12
3
12
8
16 8
8
12 1
24
I/O Connector
PCI Bus
Dither
Calibration
4
4
1 MHz
Timebase
10 MHz
Oscillator
Time
Divider
2 MHz
Timebase
Digital
Control
Logic
MITE
PCI
Interface
Chip 82C53
Ctr/Timer
Group A
82C55A
Digital
Interface
82C53
Ctr/Timer
Group B
12-Bit
D/A
12-Bit
D/A
Pgm
Gain
12-Bit
A/D
FIFO Input
Mux
Data/Address
Interface Control
Error Reporting
Arbitration
System
Interrupt
1
2
2
2
6
37
Address
Data
Control
Interrupt
DRQ
1
1
4
8
5
1