Table 1-9. Signal And Connector Pin Assignments For Parallel Interface - Epson STYLUS PRO XL 4004677 Service Manual

Stylus Pro XL
Table 1-9 shows the connector pin assignments and signal functions of the 8-bit parallel interface.

Table 1-9. Signal and Connector Pin Assignments for Parallel Interface

Pin No. Signal Name
1 STROBE
2-9 DATA 1-8
10 ACKNLG
11 BUSY
12 PE
13 SLCT
14 AFXT
31 INIT
32 ERROR
35 +5 V
17 CHASSIS
16 GND
19-30 —
33,36
—
15,18,34 —
* The I/O column indicates the direction of the signal as viewed from the printer.
Rev.A
I/O*
The STROBE pulse is used to read data from the host
computer. The pulse width must be 0.5 s or more. Normally,
I
it is HIGH, and data is latched with the rising edge of this
signal.
DATA 1-8 are parallel data bits. When one of these signals is
HIGH, the data bit is 1; when LOW, the data bit is 0. The
most significant bit (MSB) is DATA 8. The signal state must
I
be maintained for 0.5 s on either side of the STROBE
signal's active edge.
ACKNLG is an acknowledge pulse with a width of
approximately 10 s. This signal goes LOW upon the
O
completion of data reception to indicate that the printer is
ready to receive further data.
The BUSY signal informs the host computer of the printer's
O status. When this signal is HIGH, the printer cannot accept
any more data.
This signal indicates whether paper is available in the printer
O
or not. A HIGH level indicates no paper.
O
Pulled up to +5 V through a 1.0 K resistor in the printer.
If this signal is set to LOW, the printer automatically performs
one line feed upon receipt of a CR (carriage return) code. The
I
status of this signal is checked only at power on and
initialization.
If this signal goes LOW, the printer is initialized. The pulse
I
width of this signal must be 50 s or more.
This signal goes LOW if the printer has a fatal error or runs
O
out of paper.
—
Pulled up to +5 V through 1.0 K resistor in the printer.
— Chassis ground.
— Signal ground.
— —
—
Not used.
— —
Product Description
Description
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