Epson LQ-1170 - Parallel Interface; Data Transmission Timing; Table 1-11. Connector Pin Assignments and Signal Functions

REV.-A
1.3 PARALLEL INTERFACE
The specifications for the printer’s 8-bit parallel
Data format
Synchronization
Handshaking
Signal level
Adaptable connector
Data transmission timing
BUSy
ACKNLG
DATA
STROBE
interface are as follows:
8-bit parallel
/STROBE
signal
BUSY and
/ACKNLG signal
TTL-compatible
57-30360 (AmphenOl) or equivalent
See Figure 1-6.
/
A
,
[
w
H
Figure 1-6. Data Transmission Timing
Table 1-11 provides the connector pin assignments and describes the signal functions of the 8-bit parallel interface.
Table 1-11. Connector Pin Assignments and Signal Functions
Pin No.
1
2
3
4
5
6
7
8
9
10
11
12
13
Signal Name
STROBE
DATA 1
DATA 2
DATA 3
DATA 4
DATA 5
DATA 6
DATA 7
DATA 8
ACKNLG
BUSY
PE
SLCT
Return
Pin No.
19
20
21
22
23
24
25
26
27
28
29
30
—
Dir.
IN
IN
IN
IN
IN
IN
IN
IN
IN
OUT
OUT
OUT
OUT
Function
STROBE pulse to read the input data. Pulse width
must be more than
0.5 #s. Input data is latched at
the falling edge of this signal.
Parallel input data to the printer.
HIGH level means data 1.
LOW level means data O.
This pulse indicates data has been received and
the printer is ready to accept more data. Pulse
width is approximately 11
KS.
HIGH indicates the printer cannot accept more
data.
HIGH indicates paper out. This signal is effective
only when the ERROR signal is LOW.
Always
HIGH output. (Pulled up to +5 V through a
S. SK-ohm resistor.)
c
..ZY
1-14