Epson original Benutzerhandbuch

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All interface conditions are based on TTL level. Both the rise

and fall of each signal must be less than 0.2 microseconds.

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The column heading “Direction” refers to the direction of

signal flow as viewed from the printer.

• “Return” denotes the twisted-pair return, to be connected at

signal ground level. For the interface wiring, be sure to use a

twisted-pair cable for each signal and to complete the

connection on the return side. These cables should be shielded

and connected to the chassis of the host computer and the

printer.

The figure below shows the timing for the parallel interface.

SELECT

DATA 1-8

DATA STROBE

BUSY

ACK

A: 1 µs (min.)

B: 1 µs (min.)

C: 1 µs (min.)

D: approx. 6 µs