Epson LQ-570e - Setting Up the Printer

EPSON LQ-570e/LQ-580 Revision C
Product Description Interface Specifications
2
5
1.4 Interface Specifications
EPSON LQ-570e/LQ-580 provides bi-directional 8 bit parallel interface and Type-B
optional interface slot as standard.
1.4.1 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)
* 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 which is equivalent to 7.5 k
Ω .
Figure 1-7. Data Transmitting Timing
* Rise and fall time of output signals
** Rise and fall time of input signals.
Table 1-20. Parameter
Parameter Minimum Maximum Condition
V
OH
*-- 5.5V
V
OL
* -0.5V --
I
OH
* -- 0.32mA V
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
Table 1-21. 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
500 nsec 10 us
t
nbusy
0 --
t
next
0--
t
tout
* -- 120 nsec
t
tin
** -- 200 nsec