Epson LQ-670 User Manual download pdf (Page 158)

Parallel Interface Specifications

The printer comes with a bidirectional, 8-bit, parallel interface and an

optional interface slot.

Forward channel

Transmission mode: 8-bit parallel, IEEE-1284 compatibility

mode

Adaptable connector: 57-30360 (Amphenol) or equivalent

Synchronization:

STROBE pulse

Handshaking: BUSY and

ACKNLG signals

Signal level: TTL compatible (IEEE-1284 level 1 device)

Reverse channel

Transmission mode: IEEE-1284 Nibble Mode

Adaptable connector: 57-30360 (Amphenol) or equivalent

Synchronization: Refer to the IEEE-1284 specification

Handshaking: Refer to the IEEE-1284 specification

Signal level: IEEE-1284 Level 1 device

Data transmission

timing: Refer to the IEEE-1284 specification

Extensibility request: The printer responds to the extensibility

request in the affirmative when the

request is 00H or 04H, which means:

00H: Request nibble mode of reverse channel

transfer

04H: Request device ID in nibble mode of

reverse channel transfer

Adonis Rev.E

A5 size Appendix A

97/04/07 pass 0

A-12

Specifications

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Epson LQ-670 User Manual Page 158