Epson Stylus Pro - Stylus Color Pro Ink Jet Printer Технический паспорт - Страница 4
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EPSON Stylus Pro and Pro XL
Pin assignments
Signal
Return
pin
pin
Signal
1
19
STROBE
2
20
DATA 1
3
21
DATA 2
4
22
DATA 3
5
23
DATA 4
6
24
DATA 5
7
25
DATA 6
8
26
DATA 7
9
27
DATA 8
10
28
ACKNLG
11
29
BUSY
12
30
PE
13
-
SLCT
14
-
AUTO
FEED
XT
15
-
NC
16
-
GND
17
-
CHASSIS
GND
18
-
NC
19-30
-
GND
31
16
INIT
32
-
ERROR
EPSON Stylus Pro and Pro XL-4
Direction
Description
STROBE
IN
pulse to read
data.
IN
These signals represent
information in bits 0 to 7 of
IN
IN
parallel data respectively.
Each signal is at HIGH level
IN
IN
when data is logical 1 and
LOW when it is logical 0.
IN
IN
IN
About a 5- s pulse. LOW
OUT
indicates data has been
received and the printer is
ready to accept more data.
OUT
A HIGH signal indicates the
printer cannot receive data.
The signal goes HIGH in the
following cases:
1) During data entry
(for each character)
2) During initialization
3) During self test and
default-setting printing
4) During a printer-error
state
A HIGH signal indicates the
OUT
printer is in a paper-out
state or in an error state
OUT
Pulled up to +5 V through
1 k
resistance
IN
When this signal is LOW,
the paper is automatically
fed one line after printing
Not used
-
-
Logic ground level
Printer's chassis ground,
-
which is connected to the
logic ground
-
Not used
Twisted-pair return signal
-
ground level
IN
When this signal goes LOW,
the printer controller is reset
to its state when the power
is first turned on and the
print buffer is cleared. This
level is normally HIGH; its
pulse width must be more
than 50 s at the receiving
terminal.
OUT
This signal level goes LOW
when the printer:
1) Is out of paper
2) Is in an error state
3) Has no ink cartridges
installed
Signal
Return
pin
pin
Signal
33
-
GND
34
-
NC
35
-
+5 V
36
-
NC
Notes:
The column heading "Direction" refers to the direction of signal
flow as viewed from the printer.
"Return pin" denotes the twisted-pair return pin to be
connected at signal ground level. For the interface wiring, be
sure to use a twisted-pair cable for each signal and to complete
the connection on the return side.
All interface conditions are based on TTL level. Both the rise
and fall times of each signal must be less than 0.2 microseconds.
Data transfer must be carried out by observing the ACKNLG or
BUSY signal. Data transfer to this printer can be carried out
only after receipt of the ACKNLG signal or when the level of the
BUSY signal is LOW.
Timing chart
The figure below shows the timing chart for the parallel
interface.
BUSY
ACKNLG
DATA
STROBE
0.5 s (Min.)
Transition time (both the rise and the fall) of every signal must be less
than 0.2 s.
Serial Interface
The printer's built-in serial interface is based on the RS-422
standard to allow the printer to be connected to an Apple
Macintosh.
Standard:
Synchronization:
Bit rate:
Handshaking:
8/1/95
Direction
Description
-
Same as for pins 19-30
Not used
-
OUT
Pulled up to +5 V through
1 K
resistance
-
Not used
0 s (Min.)
Based on RS-422
Asynchronous
57.6 Kbps/230.4 Kbps
DTR and XON/XOFF protocol
Ink Jet Printers
0 s (Min.)
5 s (Typ.)