Parallel Interface - Compatibility Mode; Data Transmission Timing - Epson Stylus PRO Color Large Format Inkjet Printer 7000 Service Manual

EPSON Stylus Pro 7000

1.2.1 Parallel Interface - Compatibility Mode

Table 1-13. Parallel Interface Specifications
Item
Transmission mode 8-bit parallel, IEEE-1284 compatibility mode
Synchronization By STROBE pulse
Handshaking By BUSY and ACKNLG signal
TTL compatible level (IEEE-1284 Level 1 device)
Logic Level
57-30360 (Amphenol) or equivalent
Connector
Note: Use a twisted-pair cable that is as short as possible.
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.
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
Product Description
Description
Interfaces
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

DATA data byte n
-STROBE
t
setup
BUSY
t
ready
-ACKNLG
Figure 1-3. Data Transmission Timing
Revision B
data byte n + 1
t
hold
t
next
t
stb
t
busy
t t t
reply
ack nbusy
23