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Measurement, Instrumentation, and Sensors Handbook, Second Edition, 2nd Edition
book

Measurement, Instrumentation, and Sensors Handbook, Second Edition, 2nd Edition

by John G. Webster, Halit Eren
February 2014
Intermediate to advanced content levelIntermediate to advanced
1921 pages
82h 13m
English
CRC Press
Content preview from Measurement, Instrumentation, and Sensors Handbook, Second Edition, 2nd Edition
89-16 Signal Processing
89.5.5 Digital Input and Output
ese cards provide I/O lines, normally in groups of eight, which may be used to sense or generate
di
gital
sig
nals
fo
r
de
vices
ou
tside
th
e
co
mputer
. A gr
oup
of ei
ght
in
put
li
nes
is re
ferred
to as an (8 bi
t)
in
put
po
rt
an
d
a gr
oup
of ei
ght
ou
tput
li
nes
as an (8 bi
t)
ou
tput
po
rt
. In
put
an
d
ou
tput
le
vels
va
ry
fr
om
ca
rd
to ca
rd
an
d
it is be
st
to co
nsult
th
e
ap
propriate
da
ta
sh
eet
. Ty
pically,
vo
ltages
be
tween
2.5 an
d
5.0V
ar
e
co
nsidered
as hi
gh
lo
gic
le
vels,
wh
ereas
vo
ltages
be
tween
0.0 an
d
0.5 ar
e
co
nsidered
as lo
w
lo
gic
levels. ese levels are sometimes referred to loosely as transistor–transistor logic (TTL) levels. Note
th
at
th
e
ac
tual
lo
gic
le
vels
us
ed
by th
e
va
rious
TT
L
fa
milies
di
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Publisher Resources

ISBN: 9781439848913