Epson Stylus Color 670 Service Manual

EPSON Stylus Color 670 Revision A
Product Description Interface 18
NOTE: * In/Out refers to the direction of signal flow from the printer’s
point of view.
Table 1-7. Connector Pin Assignment and Signals (F-Channel)
Pin
No.
Signal Name
Return
GND Pin
In/Out Functional Description
1 HostClk 19 In Host clock signal.
2 DATA0 20 In The DATA 0 through DATA7
signals represent data bits 0-7
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 to
the printer.
3 DATA1 20 In
4 DATA2 20 In
5 DATA3 20 In
6 DATA4 20 In
7 DATA5 20 In
8 DATA6 20 In
9 DATA7 20 In
10 PtrClk 28 Out Printer clock signal.
11
PtrBusy/
DataBit-3,7
29 Out
Printer busy signal and reverse
channel transfer data bit 3 or 7.
12
AckDataReq/
DataBit-2,6
28 Out
Acknowledge data request signal
and reverse channel transfer data
bit 2 or 6.
13
Xflag/
DataBit-1,5
28 Out
X-flag signal and reverse channel
transfer data bit 1 or 5.
14 HostBusy 30 In Host busy signal.
31 -INIT 30 In Not used.
32
-DataAvail/
DataBit-0,4
29 Out
Data available signal and reverse
channel transfer data bit 0 or 4.
36 1284-Active 30 In 1284 active signal
18 Logic H - Out
Pulled up to +5V via 3.9K ohm
resistor.
35 +5V - Out
Pulled up to +5V via 3.3 K ohm
resistor.
17 Chassis - - Printer chassis GND.
16, 33
19-30
GND - - Twist pair return GND.
15, 34 NC - - Not used.
Table 1-7. Connector Pin Assignment and Signals (F-Channel)
Pin
No.
Signal Name
Return
GND Pin
In/Out Functional Description

Epson Stylus Color 670 Specifications

General

Brand	Epson
Model	Stylus Color 670
Category	Printer
Language	English