Epson Stylus Pro 10000 Series, Service Manual

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EPSON Stylus Pro 10000/10000CF Revision B
Product Description Interfaces 34
Table 1-18. Connector Pin Assignments - ECP Mode
Pin No. Signal Name Return GND Pin In/Out* Functional Description
1
HostClk
19 In
In Data or address information are transferred from a host to a printer.
2 DATA0 20 In
The DATA0 through DATA7 signals represent data bits 0 to 7,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.
3 DATA1 21 In
4 DATA2 22 In
5
DATA3
23 In
6
DATA4
24 In
7
DATA5
25 In
8
DATA6
26 In
9 DATA7 27 In
10 PeriphClk 28 Out Data is transferred from a printer to a host.
11
PeriphAck
29 Out
A printer uses this signal for a flow control of forward direction. Also this signal
offers the data bit 9 that use it to judge whether or not it is information command
information or data to be output on the data signal of reverse direction.
12
nAckReverse
28 Out
A printer does drive to Low and approve nReverseRequest.
13 Xflag 28 Out X-flag signal and reverse channel transfer data bit 1 or 5.
14 HostAck 30 In
A host uses this signal for a flow control of reverse direction. Also this signal
offers the data bit 9 that use it to judge whether or not it is information command
information or data to be output on the data signal of forward direction.
31
nReverseRequest
30 In
This signal is made a low, to change a channel toward reverse.
32 nPeriphRequest 29 Out This signal uses to produce a host interrupt.
36 1284-Active 30 30 In 1284 active signal. "HIGH" in ECP mode
18 PeriphLogic-H - Out Always "HIGH". Pulled up to +5 V via 3.9 K ohm resistor.
35
+5V
- Out
Always "HIGH". Pulled up to +5 V via 1.0 K ohm resistor.
17
Chassis GND
- -
Chassis GND.
16,33,19-30
GND
- -
Signal GND.
15,34
NC
- -
Not connected.