Epson LX-300, Service Manual

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LX-3(3O Service Manual
Description
1.3 INTERFACE SPECIFICATIONS
LX-300
has parallel interface and serial interface, one of which can be selected in default setting
mode. Auto selection is also available.
1.3.1 Parallel Interface Specifications
The LX-300
is equipped with an 8-bit parallel interface, standard.
Data format:
8-bit parallel
Synchronization:
By
Handshaking:
By BUSY and signals
Signal level:
level
Adaptable %-pm 57-30360 or equivalent
Data transmission timing:
See Figure 1-7.
BUSY
DATA
S T R O B E — —
—
0.5 (minimum)
0.5
(minimum)
0.5
(minimum)
Figure 1-7. Data Transmission Timing
Note:
Transition time (rise time and fall time) of every input signal must be less than 0.2
The Busy signal is active (HIGH) under the following conditions:
- During data reception (See Figure 1-7.)
- When the
buffer is full
- When the INIT input signal is active
- During initialization
- When the ERROR signal is active
- During the self-test mode
- During the default-setting mode
The ERROR signal is active (LOW) under the following conditions:
- When a paper-out error occurs
- When a release lever operation error occurs
- When a fatal error occurs
The PE signal is active (HIGH) under the following conditions:
- When a paper-out error occurs
Rev. A
1-11