Epson LQ-670 - Parallel Interface Sp Ecifications; Forw Ard Channel; Reverse Channel

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
L
Adonis Rev.C
A5 size Appendix A
96/12/ 19 pass 5
A-12
Specifications