Epson 4003353 - Manual (Page 18)

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