Figure 1-6. Data Transmission Timing; Table 1-11. Connector Pin Assignments And Signal Functions - Epson LX-810 Technical Manual

1.3 INTERFACE OVERVIEW
The standard 8-bit parallel interface provided with this printer meets the specifications described below.
Data Format
Synchronization
Handshaking
Signal Level
Adaptable Connector
Data Transmission Timing See Figure 1-6
BUSY
DATA
STROBE
Table 1-11 shows the connector pin assignments and signal functions of the 8-bit parallel interface.

Table 1-11. Connector Pin Assignments and Signal Functions

Pin No.
Signal Name
1
2 DATA 1
3 DATA 2
4 DATA 3
5 DATA 4
6 DATA 5
7 DATA 6
8 DATA 7
9 DATA 8
10
11 BUSY
12 PE
13
SLCT
8-bit parallel
By STROBE pulse
By BUSY and ACKNLG signal
57-30360 (amphanol) or equivalent
min.
min.

Figure 1-6. Data Transmission Timing

Return Pin No. D I R
19 In
In
2 0
21 "HIGH" level means data " 1".
22 In "LOW" level means data "O".
23 In
24 In
In
25
In
26
27 In
28 out This pulse indicates data is received and ready to
accept next data.
Pulse width is 121.M approx.
"HIGH" indecates printer cannot accept next data.
29 out
"HIGH" indicates paper-out.
30 out
This signal is effective only when ERROR signal is
"LOW".
Always "HIGH" output. (Pulled up to +5V through
—
3.3kohms register.)
1-12
,
.
Functional Description
Strobe pulse to read the input data. Pulse width must
be more than 0.5,us. Input data is latched at falling edge
of this signal.
Parallel input data to the printer.