IBM DAS16AO Manuale Utente
Chapter 1
Introducing the PC-CARD-DAS16/16AO
Overview: PC-CARD-DAS16/16AO features
The PC-CARD-DAS16/16AO is a data acquisition and control board for IBM PC compatible computers with
PCMCIA type II slots. The PC-CARD-DAS16/16AO provides 16 single-ended or 8 differential analog inputs,
16-bit A/D resolution, two analog outputs, four digital I/O lines, and three 16-bit down counters.
PCMCIA type II slots. The PC-CARD-DAS16/16AO provides 16 single-ended or 8 differential analog inputs,
16-bit A/D resolution, two analog outputs, four digital I/O lines, and three 16-bit down counters.
The analog input range is fully programmable in one of four bipolar ranges. An on-board pacer clock, or an
external pacer input, or software polling can trigger A/D conversions. Transfers are via software polling,
interrupt service or REP-INSW. A 4096-word FIFO buffer provides buffering between the A/D circuit and the
PCMCIA bus.
external pacer input, or software polling can trigger A/D conversions. Transfers are via software polling,
interrupt service or REP-INSW. A 4096-word FIFO buffer provides buffering between the A/D circuit and the
PCMCIA bus.
The PC-CARD-DAS16/16AO provides two single-ended 16-bit analog voltage outputs. The analog output
range is ±10 V.
range is ±10 V.
The four digital I/O bits are available on one 4-bit port. The digital channels are software configurable as four
inputs or four outputs, and allow you to sense and control discrete events.
inputs or four outputs, and allow you to sense and control discrete events.
All signals pass through a 50-pin high-density connector. The board is completely plug-and-play, with no
switches or jumpers to set.
switches or jumpers to set.
PC-CARD-DAS16/16AO block diagram
PC-CARD-DAS16/16AO functions are illustrated in the block diagram shown here.
Controller FPGA
H
o
st
B
u
s
A
d
a
p
to
r
Counter/Pacer
Counter 1, 3 Out
10 MHz
Oscillator
2
Pacer Control
/EXT TRIG
Digital I/O
4-bits
8 channel
Analog MUX
S
ing
le
-e
n
d
ed
or
d
if
fe
ren
ti
al
s
el
ec
t
sw
it
ch
in
g
8 channel
Analog MUX
Programmable-Gain
Amplifier
Precision
Voltage
Reference
ADC
16-bit
5 µS
A/D
Pacer
Attribute Memory
Control
/Clock
FIFO Buffer 4K x 8
HI_BYTE
FIFO Buffer
LOW_BYTE
4K x 8
DAC
16-bit
VOUT 0
DAC
16-bit
VOUT 1
VREF
Control, IREQ
Data Bus
Address Bus
Figure 1. PC-CARD-DAS16/16AO functional block diagram
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