Specifications

・SELECT: Always non-active (“LOW”).

・nFAULT: Signal to set “LOW” when the printer is in the error state (negative

logic).

・PE: Signal to be output with No paper or near-end state (by command

setting) (positive logic)

Note: When using a command followed by FROM writing, printer may temporarily

become BUSY (DTR) at the time of write operation. In this case, as the

printer cannot make any processing, data transmitted may possibly be

discarded.

2) Electrical Characteristics

[1] Input signal level (nStrobe, Data0 ~ 7)

All input signals are C-MOS level.

”HIGH ” level: 2.0V min.

”LOW ” level: 0.8V max.

[2] Output signal level

All output signals are C-MOS level.

”HIGH ” level: 4.4V min.

”LOW ” level: 0.1V max.

[3] I/O conditions

All input/output signals are pulled up with 3.3 kΩ.

[Printer side] [Host side]

Vcc

Twisted pair wire

[Printer side] [Host side]

Vcc

Twisted pair wire

3.3KΩ