Epson 7000 사용자 설명서
EPSON Stylus Pro 7000
Revision B
Product Description
Interfaces
23
1.2.1 Parallel Interface - Compatibility Mode
The BUSY signal is set high before setting the -ERROR signal low or the PE
signal high. The BUSY signal remains high until all these signals return to
their normal, inactive state.
signal high. The BUSY signal remains high until all these signals return to
their normal, inactive state.
The BUSY signal is high:
When receiving data
When the input data buffer is full
When the -INIT signal is low, or during hardware initialization
During a printer error
When the parallel interface is not selected
The ERROR signal is low when there is a:
Printer hardware error (fatal error)
Paper-out error
Paper-jam error
Ink-out error
NOTE: The PE signal is high during paper-out errors.
DATA TRANSMISSION TIMING
Figure 1-3. Data Transmission Timing
Table 1-13. Parallel Interface Specifications
Item
Description
Transmission mode
8-bit parallel, IEEE-1284 compatibility mode
Synchronization
By STROBE pulse
Handshaking
By BUSY and ACKNLG signal
Logic Level
TTL compatible level (IEEE-1284 Level 1 device)
Connector
57-30360 (Amphenol) or equivalent
Note: Use a twisted-pair cable that is as short as possible.
DATA
data byte n
data byte n + 1
-STROBE
BUSY
-ACKNLG
t
hold
t
setup
t
stb
t
ready
t
busy
t
reply
t
ack
t
nbusy
t
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