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7.3.1 Parallel I/O IEEE 1284

The bidirectional parallel interface offers the “nibble” mode of IEEE1284 interface. This

enables installation in accordance with Windows “Plug & Play”.

The standard parallel interface is able to transfer data at a speed of max. 30, 000 bytes per

second. When the receiving buffer is full, the data input is blocked until the data buffer is

empty.

Connector assignment

Connector no.

Direction

Printer–PC

Signal

19–30

34–35

←

→

↔

一一一

一

←

↔

一

←

STROBE (active low)

DATA 1

DATA 2

DATA 3

DATA 4

DATA 5

DATA 6

DATA 7

DATA 8

ACK (active low)

BUSY

PAPER EMPTY (PE)

SELECT

AUTO FEED (active low)

not used

SIGNAL GROUND

CHASSIS GROUND

5 V (Imax = 500 mA)

SIGNAL GROUND INIT

(active low) ERROR

(active low) SIGNAL

GROUND not used

SELECT IN

Transmission length: max. 2,0 m

1 2 ... 105 106 107 108 109 110 111 112 113 114 115 ... 132 133

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