Panasonic Kx-P3626 Operating Instructions Manual page 62

Parallel Interfacing
A
method
of transferring
data from
a computer
to
a
printer
through
a
parallel interface
based on
the
Centronics standard.
Specifications:
•
data
transfer
speed:
1000 cps
minimum
•
synchronization:
external
STROBE
pulse
• logic levels:
TTL
(Transistor-Transistor-Logic) levels
• handshaking:
BUSY
and
ACK
signals
•
connector
type:
57-30360
(AMPHENOL)
or equivalent
•
cable:
use a shielded cable (6'571
.95
meters)
or less
in
length.
When
the printer
is
processing
data, the
BUSY
signal
is
high.
The
printer
will
not
accept
new
data from
the
computer.
After
the processing
is
completed,
the
BUSY
signal
goe
s
low
.
(The
BUSY
signal
is
also
high
when
the printer
is
OFF
LINE).
When
the busy
signal
occurs, the
ACK
signal
goes low
indicating
to
the
computer
that
the
data
has been processed and
the printer
is
ready
to
accept
more
data. This
handshaking
routine occurs
each
time a character
is
sent to
the
printer.
BUSY
SLOT
PO ERROR
ON
LINE
LOW
HIGH
LOW
HIGH
OFF
LINE
HIGH
LOW LOW LOW
PAPER OUT
HIGH
LOW
HIGH
LOW
Printer status signals
18
1
oooooooooooooooooo
OOOOOOOOOOOOOOOGOO
136 19,
Parallel interface
connector
(printer side)
Signal
pin
Return
side
pin
Signal
Direc-
tion
1
19
STB
2 20
DATA1
3
21
DATA
2
4 22
DATA
3
Input
5
23
DATA
4
6 24
DATA
5
7
25
DATA
6
8
26
DATA
7
9 27
DATA
8
10
28
ACK
11
29
BUSY Output
12
PO
Singal
pin
Return
side
pin
Signal
Direc-
tion
13
SLOT
Output
14
AUTO
FEED XT
Input
15
16
SG
17
FG
18
+5V
Output
31
30
PRIME
Input
32
ERROR
Output
33
SG
34
35
36
SLCT
IN
Input
Pin configuration
(Parallel)
62