Epson Stylus Pro 9000 - Maintenance Mode Operations

EPSON Stylus Pro 9000 Revision B
Product Description Interfaces 29
PARALLEL INTERFACE
The BUSY signal is high:
n During data entry
n When the input data buffer is full
n When the -INIT signal is low, or during hardware initialization
n During a printer error
n When the parallel interface is not selected
The ERROR signal is low when there is a:
n Printer hardware error (fatal error)
n Paper-out error
n Paper-jam error
n Ink-out error
NOTE: The PE signal is high during a paper-out error.
Note: “In/Out” is signal direction as viewed from printer.
The interface condition is normally TTL Level, and each high/low signal takes 0.2uS or less.
The printer only sends data after receiving the ACKNLG confirmation or when the BUSY signal
is low.
Table 1-27. Parallel Interface - Compatibility Mode
Item Description
Transmission mode 8-bit parallel, IEEE-1284 compatibility mode
Synchronization By STROBE pulse
Handshaking By BUSY and ACKNLG
signal
Logic Level
TTL compatible level (IEEE-1284 Level 1 device)
Connector
57-30360 (Amphenol) or equivalent 36-pin
Note 1: Use a twisted-pair cable.
Note 2: The BUSY signal is set high before setting the -ERROR signal low or the PE
signal high. The BUSY signal remains high until all these signals return to their normal
state.
Table 1-28. Connector Pin Assignments - Forward Channel
Pin
No.
Signal
Name
Return
Pin
In/
Out
Functional Description
1
STROBE
19 I
Data reception pulse, 0.5uS or greater pulse width
required. Usual state is HIGH, and reads data after
going to LOW state.
2-9
DATA0~7
20-27 I
The DATA0 through DATA7 signals represent data bits
0 to7, respectively. Each signal is at high level when
data is logical 1 and low level when data is logical 0.
These signals are used to transfer the 1284 extensibility
request values to the printer.
10
ACKNLG
28 O
When LOW the printer has finished preparing to receive
signals and can accept data. Pulse width is about 1uS or
3uS Printer clock signal.
11
BUSY
29 O
HIGH means the printer cannot receive data. This
occurs when the printer is receiving data or when the
printer is in an error state.
12
PE
28 O
HIGH means no paper is loaded. (LOW means an error.)
13
SLCT
28 O
Always HIGH. Pulled up to +5V via 1.0Kohm
14
AFXT
30 I
Not used
15
NC Not connected
16
GND Ground for twisted pair return
17
Chassis Ground for frame/body
18
Logic H Pulled up to +5V via 3.9Kohm
19-30
GND Ground for twisted pair return
31
-INIT
30 I
Pulse width of 50uS or more means LOW pulse, and the
falling edge of LOW signal causes the printer to initialize.
32
ERROR
29 O
LOW means printer error
33
GND
---- ----
Ground for twisted pair return
34
NC
---- ----
Not connected
35
+5V
---- O
HIGH during normal operation. Pulled up to +5V via
1.0Kohm
36
SLCTIN
30 I
Not used