Theory Of Operation; Functional Overview; Pci-1200 Block Diagram; Timing Circuitry - National Instruments DAQ PCI-1200 User Manual

Theory of Operation

Functional Overview

Data/Address
37
Interface Control
6
Error Reporting
2
Interface
Arbitration
2
System
2
Interrupt
1
© National Instruments Corporation
This chapter explains the operation of each functional unit of the PCI-1200.
The block diagram in Figure 4-1 shows a functional overview of the
PCI-1200 board.
Address
5
Data
Digital
8
Control
Control
MITE
Logic
PCI
4
Interrupt
Chip
1
DRQ
1
Timebase
10 MHz
Oscillator
The major components of the PCI-1200 are as follows:
• MITE PCI interface circuitry
•

Timing circuitry

•

Analog input circuitry

•

Analog output circuitry

16
12-Bit
FIFO
A/D
12
82C53 82C55A
Ctr/Timer Digital
Group A Interface
1 MHz
8
2 MHz
Time
Timebase
Divider
Figure 4-1. PCI-1200 Block Diagram
4-1
4
Dither
Pgm Input
Gain Mux
4
3
Calibration
4
12
1
12-Bit
D/A
24
12
1
12-Bit
D/A
82C53
8
Ctr/Timer
Group B
PCI-1200 User Manual
8