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Operating instructions

ManualsBrandsDigiPos ManualsComputer equipmentDS-810
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Symbol
Description
A
device
with
two
or
more
inputs
and
one
output
.
The
output
of
the
AND
gate
is
HI
if
and
only
if
all
of
the
inputs
are
at
the
H
I
state
.
A
device
with
two
or
more
inputs
and
one
output
.
The
output
of
the
NAND
gate
is
LO
if
and
only
if
all
of
the
inputs
are
at
the
H
I
state
.
A
device
with
two
or
more
inputs
and
one
output
.
The
output
of the
OR
gate
is
HI
if
one
or
more
of the
inputs
are
at
the
H
I
state
.
A
device
with
two
or
more
inputs
and
one
output
.
The
output
of the
NOR
gate
is
LO
if
one
or
more
of
the
inputs
are
at
the
H
I
state
.
A
device
with
one
input
and
one
output
.
The
output
state
is
always
opposite
to
the
input
state
.
X
X
D
X
X
TABLE
3-1
Basic
Logic
Reference
Theory
of
Operation-71380
Input/Output
Table
Input
/
output
Input
Output
Input
/Output
Input
Output
A
B
X
LO LO
LO
LO
H
I
LO
H
I
LO
LO
HI
HI HI
A
B
X
LO LO
H
I
LO
HI HI
HI
LO
HI
H
l
HI
I
LO
A
B
X
LO LO
LO
LO
HI
HI
HI
LO
HI
HI HI
I
HI
A
B
X
LO LO
H
I
LO
H
I
LO
H
I
LO
LO
HI
I
HI
I
LO
Device
AND
gate
A
B
NAND
gate
A
B
OR
gate
A
e
NOR
gate
A
B
I
nverter
A