Measurement-computing PCM-DAC02 Bedienungsanleitung PDF herunterladen (Seite 5)

1 INTRODUCTION

The PCM-DAC02 is an analog output control board for IBM PC compatible

computers with PCMCIA type slots. The heart of the board is a dual 12-bit digital-to-

analog converter. Analog voltage signals are generated by the D/A from registers.

Control of I/O operations is done by the Field Programmable Gate Array (FPGA) on

the board (Figure 1-1). Double-buffering of the output registers permit simultaneous

output changes.

Ranges of the two analog outputs are individually programmable for bipolar ±5V or

±10V, or unipolar 0 to 5V or 0 to 10V.

Eight bi-directional digital I/O lines arranged in two, 4-bit ports provide the capability

of sensing and controlling discrete events. The ports can be programmed to be eight

inputs, eight outputs, or four inputs and four outputs.

Figure 1-1. PCM-DAC02 Block Diagram

PCMCIA BUS CONNECTOR P1

(

68-PIN

)

ADDRESS

BUS

HOST BUS ADAPTER

CONTROLLER

FPGA

D/A

CONVERTER

12-BIT

P2 CONNECTOR (15 PIN)

PCM-DAC02

DIGITAL

I/O

PORT

4 BITS

DIGITAL

I/O

PORT

4 BITS

ATTRIBUTE

MEMORY

DATA

BUS

D/A

CONVERTER

12-BIT

1 2 3 4 5 6 7 8 9 10 ... 19 20

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Measurement-computing PCM-DAC02 Bedienungsanleitung Seite 5