Table 1-4. Connector Pin Assignments And Signals (Forward Channel) - Epson Stylus 1500 Service Manual

Stylus 1500 Service Manual
Table 1-4 shows the connector pin assignments and signals for the forward channel of the parallel interface.
Table 1-5 shows this information for the reverse channel.

Table 1-4. Connector Pin Assignments and Signals (Forward Channel)

Pin No. Signal Name
1 STROBE
2 - 9 DATA 0 - 7
10 ACKNLG
11 BUSY
12 PE
13 SLCT
14 AFXT
15 NC
31 INIT
32 ERROR
36 SLIN
18 Logic H
35 +5 V
17 Chassis GND
16, 33
GND
19 - 30
15, 34 NC
Note: The I/O column indicates the direction of the signal as viewed from the printer.
Rev. A
Return
I/O
GND Pin
Reading of data is performed at the falling
19 I
edge of this pulse.
Signals DATA0 - DATA7 represent data bits 0
to 7, respectively. Each signal is HIGH when
20 - 27 I
the data is logical 1 and LOW when the data is
logical 0.
This signal is a negative pulse indicating that
28 O
the printer can accept more data.
When this signal is HIGH, the printer cannot
29 O
receive data.
When this signal is HIGH, the printer detects a
28 O
paper-out error.
This signal is always HIGH when the printer is
28 O
powered on.
30 I
— — Not connected.
The falling edge of a negative pulse or a LOW
signal on this line causes the printer to
30 I
initialize. A 50 s (minimum) pulse is
necessary.
When this signal is LOW, the printer detects an
29 O
error.
30 I Not used.
— O
Pulled up to +5 V via a 3.9 K
— O
Pulled up to +5 V via a 3.3 K
— — Chassis ground.
— — Signal ground.
— — Not used.
General Description
Description
resistor.
resistor.
1-9