Epson DFX-9000 Service Manual page 35

Epson DFX-9000
Pin No. Signal name
5 DATA4
6 DATA5
7 DATA6
8 DATA7
9 DATA8
10 PtrClk
11 PtrBusy / DataBit-3, 7
12 AckDataReq / DataBit-2, 6
13 Xflag / DataBit-1, 5
14 HostBusy
31 -INIT
32 -DataAvail / DataBit-0, 4
36 1284-Active
18 Logic-H
35 +5 V
17 Chassis
16, 33 GND
19-30
15, 34 NC
* In/Out refers to the direction of signal flow from the printer side.
Product Description
Table 1-21. Connector pin assignment, reverse channel (continued)
Return GND
In/Out*
Pin
23 In
24 In
25 In
26 In
27 In
28 Out
29 Out
28 Out
28 Out
30 In
30 In
29 Out
30 In
- Out
- Out
- -
- -
- -
Function description
Printer clock signal
Printer busy signal and reverse channel transfer data bit 3 or 7.
Acknowledge data request signal and reverse channel transfer data
bit 2 or 6.
X-flag signal and reverse channel transfer data bit 1 or 5.
Host busy signal
Not used.
Data available signal and reverse channel transfer data bit 0 or 4.
1284 active signal
This line is pulled up to +5 V through a 3.9 kΩ resistor.
This line is pulled up to +5 V through a 1.0 kΩ resistor.
Chassis GND
Signal GND
Not connected.
Basic specifications
Revision B
bit 3
bit 4
bit 5
bit 6
bit 7: MSB
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