Epson LX-300+ Service Manual

LX-300+/1170 Revision C
PRODUCT DESCRIPTION Interface Specifications 21
1.3 Interface Specifications
LX-300+/1170 provides bi-directional 8 bit parallel interface and serial interface. Optional
interface board is not supported on this model.
1.3.1 Parallel Interface (Forward Channel)
o Transmission mode: 8 bit parallel
IEEE-1284 compatibility mode
o Adaptable connector: 57-30360 (Amphenol) or equivalent
o Synchronization: -STROBE pulse
o Handshaking: BUSY and -ACKLG signals
o Signal level: TTL compatible
(IEEE-1284 level 1 device)
Figure 1-6. Data Transmitting Timing
Table 1-10. Parameter
Parameter Minimum Maximum Condition
V
OH
*-- 5.5V
V
OL
* -0.5V --
I
OH
*--0.32mAV
OH
=2.4V
I
OL
* -- 12mA V
OL
=2.4V
C
O
-- 50pF
V
IH
-- 2.0V
V
IL
0.8V --
I
IH
-- 0.32mA V
IH
=2.0V
I
IL
-- 12mA V
IL
=0.8V
C
I
-- 50pF
NOTE: * Logic-H signal is 2.0V or lower when the printer is off and the signal
is 3.0V or higher when the printer is on. The receiver has impedance
whichisequivalentto7.5k
Ω.
Table 1-11. Maximum & Minimum Timings for Data Transmission
Parameter Minimum Maximum
t
setup
500 nsec --
t
hold
500 nsec --
t
stb
500 nsec --
t
ready
0 --
t
busy
-- 500 nsec
t
reply
-- --
t
ack
500nsec 10us
t
nbusy
0 --
t
next
0--
t
tout
* -- 120 nsec
t
tin
** -- 200 nsec
NOTE: * Rise and fall time of output signals.
** Rise and fall time of input signals.

Epson LX-300+ Specifications

General

Emulation	Epson ESC/P, IBM PPDS
Print Method	9-pin, impact dot matrix
Interface	Parallel
Paper Handling	Friction feed
Dimensions	366 x 275 x 159 mm
Paper Width	4 - 10 inches