Interfaces; Parallel Interface; Compatibility Mode - Epson Stylus Pro 7600 Service Manual

EPSON Stylus Pro 7600/9600

1.6 Interfaces

1.6.1 Parallel Interface

1.6.1.1 Compatibility Mode

SPECIFICATION
Transmission mode: 8 bit parallel
Synchronization: By STROBE pulse
Handshaking: By BUSY and ACKNLG signal
Signal level: TTL level (IEEE1284Level 1 device)
Adaptable connector: 57-30360(amphenol) 36 pin or equivalent
NOTE: It is recommended to use as short an interface cable as possible.
CONNECTOR PIN ASSIGNMENT AND SIGNALS
For these signals, twist-pair wires are used, with the return side connected to the signal
ground.
Table 1-53. Connector Pin Assignment and Signals (Compatibility)
Return
Pin No. Signal Name In/Out
GND pin
1 19 -STROBE
2 20 DATA0
3 21 DATA1
4 22 DATA2
5 23 DATA3
6 24 DATA4
7 25 DATA5
8 26 DATA6
9 27 DATA7
Product Description
Function
The strobe pulse. This signal is normally "HIGH" and
read-in of data is executed after turning "LOW". The
In
pulse width required at the receive end is 0.5
more.
In
In
In
The DATA0 through DATA7 signals represent data
In
bits 0 to 7, respectively. Each signal is at high level
when data is logical 1 and low level when data is
In
logical 0.
In
In
In
Table 1-53. Connector Pin Assignment and Signals (Compatibility) (continued)
Return
Pin No. Signal Name
GND pin
10 28 -ACKNLG
11 29 BUSY
12 28 PE
13 28 SLCT
14 30 -AFXT
31 30 -INIT
32 29 -ERROR
36 30 -SLIN
18 -- Logic H
35 -- +5V
17 -- Chassis GND
16,33
-- GND
19-30
15,34 -- NC
µ
s or
Note 1: "-" is prefixed to each signal which is active at "LOW" level.
2: In/Out refers to the direction of signal flow from the printer's point of view.
3: The "return side" means twist-pair return, which is connected to the signal GND. For
interface, each signal is connected with a twist-pair wire and the return side is also
connected. For protection against noise, this cable is shielded and connected to the
chassis GND for each of the center machine and the printer.
4: All the interface conditions are based on the TTL level standard. Each of the rise time
and fall time is 0.2
5: See Figure 1-19
Interfaces
In/Out
This signal, when the signal level is "Low", indicates
that the printer has received data and is ready to accept
Out
the next data. The pulse width is 1
Figure 1-19)
This signal, when the level is "HIGH", indicates that
the printer can not receive data. When the level is
"LOW", the signal indicates that the printer can
accept data. This signal turns "HIGH" in one of the
Out
following cases:
During data entry
In error status
This signal, when the level is "HIGH", indicates
Out
paper-out error. (Valid when ERROR = "LOW")
Always at "HIGH" level when the power to the printer
Out
is on. Pulled up to +5 V via 1.0 kΩ.
In Not used
The printer is initialized by input of a "LOW" pulse
In
µ
whose width is 50
The "LOW" signal indicates that the printer is in error
Out
status.
In Not used
Always at "HIGH" level. Pulled up to +5 V via 3.9
Out
KΩ.
Always at "HIGH" level. Pulled up to +5 V via 1.0
Out
kΩ.
- Chassis GND.
- Signal GND.
- Not used
µ
s or less.
for details of signal timing.
Revision A
Function
µ µ
s or 3 s. (See
s or more.
91