Product specifications

3 – 3

2) Parallel interface signals

Pin No. Signal Direction Description

1 DATA STOROBE To printer Sample input data when changing from low

level to high level.

2 DATA BIT 1 To printer Input data: High level indicates “ 1 “ and low

level

3 DATA BIT2

4 DATA BIT3

5 DATA BIT4

6 DATA BIT5

7 DATA BIT6

8 DATA BIT7

9 DATA BIT8

10 ACKNOWLEDGE From printer Indicates character input completion, or function

operation end, at low level.

11 BUSY From printer Indicates data cannot be received at high level.

Data can be input at low level.

12 PAPER END From printer High level indicates paper end.

13 SELECT From printer High level indicates select (online) condition.

14 AUTO FEED To printer When "Auto Feed" in the menu is set as valid

under EPSON mode, this signal goes to the low

level and the printer generates a line feed after

receiving CR code.

16, 33 0V — Signal ground.

17 CHASSIS — Frame ground.

GROUND

18 + 5V From printer +5V supply (50 mA maximum)

+5V on/off is selectable by MENU.

19 to 30 0V — Twisted pair return (for pin No. 1 to 11)

31 INPUT-PRIME To printer When this signal goes to the low level, printer

controller is initialized. The low level should be

held for more than 0.5 ms.

32 FAULT From printer This signal goes from high to low level when

paper runs out.

(Possible to indicate error and OFF-Line state).

15, 34 — — Unused

35 — — Fixed to High

(Connected to +5V thru 3.3K)

36 (Select-In) To printer In the EPSON mode, when menu item "Print

Suppress Effective" is Yes, and the Select-In

signal is high, the DC1/DC3 code is valid, and

invalid when the signal is low.

Note: Pin arrangement