Product Description
Rev. A
1-13
1.5 Interfaces
The EPSON Stylus COLOR 800 is equipped with two interfaces: parallel and Mac serial interface, and a
card slot for an optional Type-B interface. This section provides information on each interface.
1.5.1 Parallel Interface (Forward Channel)
Transmission Mode 8-bit parallel, IEEE-P1284 compatibility mode
Synchronization /STROBE pulse
Handshaking BUSY and /ACKNLG signal
Signal Level TTL compatible level (IEEE-P1284 Level 1 device)
Refer to Table 1-15.
Table 1-14. Signal Level for TTL-Compatible IEEE-1284 Level 1 Device
Parameter Minimum Maximum Condition
VOH* — 5.5 V
VOL* –0.5 V —
IOH* — 0.32 mA VOH = 2.4 V
IOL* — 12 mA VOL = 0.4 V
CO — 50 pF
VIH — 2.0 V
VIL 0.8 V —
IIH — 0.32 mA VIH = 2.0 V
IIL — 12 mA VIL = 0.8 V
CI — 60 pF
Notes: * A LOW logic level on the Logic H signal line is as follows:
2.0 V or less when the printer is powered off.
3.0 V or more when the printer is powered on.
The receiver provides an impedance equivalent to 7.5K ohms to ground.
Adaptable Connector 57-30360 (Amphenol) or equivalent
The BUSY signal is set HIGH before setting either /ERROR LOW or PE HIGH, and held HIGH until all
these signals return to an inactive state. The BUSY signal is HIGH in the following cases:
During data entry.
When the input data buffer is full.
While /INIT signal is at a LOW level or during hardware initialization.
During a printer error condition (See the /ERROR signal).
During test printing.
When the printer is in default setting mode.
When the parallel interface is not selected.
Содержание Stylus Color 800
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