Epson 7000 Parallel Interface Compatibility Mode, Parallel Interface Specifications, Description

EPSON Stylus Pro 7000 Revision B

1.2.1 Parallel Interface - Compatibility Mode

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		signal
		ACKNLG
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.

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

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		data byte n + 1
	thold
-STROBE			tnext
tsetup	tstb
BUSY
tready	tbusy
-ACKNLG
	treply	tack	tnbusy

Figure 1-3. Data Transmission Timing

Product Description Interfaces 23