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EPSON Stylus Pro 7000 Revision B
Product Description Interfaces 28
Note: In (I) and Out (O) refer to the direction of signal flow from the printer’s point
of view.
Table 1-20. Connector Pin Assignments - ECP Mode
Pin
No.
Signal Name
Return
Pin
In/
Out
Functional Description
1
HostClk
19 I
Data or address information is transferred
from the host to the printer.
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
PeriphClk
28 O
Data is transferred from the printer to the
host.
11
PeriphAck
29 O
The printer uses this signal for flow
control in the forward direction. Also used
for data bit 9 which indicates command
information and data to be output on the
data signal in the forward direction.
12
nAckReverse
28 O
The printer goes to Low and approves the
nReverseRequest.Acknowledge data
request signal and reverse channel
transfer data bit 2 or 6.
13
Xflag
28 O
X-flag signal and reverse channel transfer
data bit 1 or 5.
14
HostAck
30 I
The host uses this signal for flow control
in the reverse direction. Also used for data
bit 9 which indicates command
information and data to be output on the
data signal in the forward directions.
15
NC Not connected
16
GND Signal ground
17
Chassis GND Chassis ground
18
PeriphLogic-
H
O
Always HIGH. Pulled up to +5V via 3.9K
ohm resister.
19-30
GND Ground for twisted pair return
31
nReverseReq
uest
30 I
This signal goes low to change to the
reverse channel.
32
nPeriphRequ
est
29 O
This signal produces a host interrupt.
33
GND Ground for twisted pair return
34
NC Not connected
35
+5V
---- O
Always HIGH. Pulled up to +5V via 1.0K
ohm resister.
36
1284-Active
30 I
1284 Active Signal. HIGH in ECP mode
Table 1-20. Connector Pin Assignments - ECP Mode
Pin
No.
Signal Name
Return
Pin
In/
Out
Functional Description