Epson Stylus COLOR 880 Service Manual page 16

EPSON Stylus COLOR 880
Table 1-4. Typical Time of tack
Parallel I/F Mode
High Speed
Normal Speed
Table 1-5. Signal Level: TTL Compatible (IEEE-1284 level 1 device)
Parameter Minimum
VOH* -
VOL* -0.5V
IOH* -
IOL* -
CO -
VIH -
VIL 0.8V
IIH -
IIL -
CI -
* A low logic level on the Logic H signal is 2.0V or less when the printer
is powered off, and this signal is equal to or exceeding 3.0V when the
printer is powered on. The receiver shall provide an impedance
equivalent to 7.5K ohm to ground.
PRODUCT DESCRIPTION
Typical Time of tack
1us
3us
Maximum Condition
5.5V
-
0.32mA VOH = 2.4V
12mA VOL = 0.4V
50pF
2.0V
-
0.32mA VIH = 2.0V
12mA VIL = 0.8V
50pF
INTERFACE
Table 1-6. Connector Pin Assignment and Signals
Signal Return
Pin No.
Name GND Pin
1 -STROBE 19
2 DATA0 20
3 DATA1 21
4 DATA2 22
5 DATA3 23
6 DATA4 24
7 DATA5 25
8 DATA6 26
9 DATA7 27
10 -ACKNLG 28
11 BUSY 29
12 PE 28
13 SLCT 28
14 -AFXT 30
31 -INIT 30
32 -ERROR 29
36 -SLIN 30
Revision A
In/Out Functional Description
The strobe pulse. Read-in of data is
In performed at the falling edge of this
pulse.
In
In
The DATA0 through DATA7 signals
In
represent data bits 0 to 7,
In
respectively.
Each signal is at high level when data
In
is logical 1 and low level when data is
In
logical 0.
In
In
This signal is a negative pulse
Out indicating that the printer can accept
data again.
A high signal indicates that the printer
Out
cannot receive data.
A high signal indicates paper-out
Out
error.
Always at high level when the printer
Out
is powered on.
In Not used.
The falling edge of a negative pulse
or a low signal on this line causes the
In
printer to initialize. Minimum 50us
pulse is necessary.
A low signal indicates printer error
Out
condition.
In Not used.
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