User`s guide
Parallel interface (forward channel)
Transmission mode:
8-bit parallel, IEEE-P1284 compatibility
mode
Adaptable connector: 57-30360 (Amphenol) or equivalent
Synchronization:
STROBE pulse
Handshaking:
BUSY and ACKNLG signals
Signal level: TTL. compatible (IEEE-P1284 level 11 device)
The following table lists the parallel connector pin assignments and
describes their respective interface signals.
Pin
Signal
no.
name
GND
In/Out*
Description
1
STROBE
19
In
Strobe pulse. Input data is latched at
falling edge of the signal.
2
DATA 1
20
In
Parallel input data to the printer.
bit O:LSB
3
DATA 2
21
In
bit 1
4
DATA 3
22
In
bit 2
5
DATA 4
23
In
bit 3
6
DATA 5
24
In
bit 4
7
DATA 6
25
In
bit 5
8
DATA 7
26
In
bit 6
9
DATA 8
27
In
bit 7:MSB
10
ACKNLG
28
Out
This signal (negative pulse) indicates
that the printer has received data and is
ready to accept more.
11
BUSY
29
Out
This signal's high level means that the
printer ready to accept data.
12
PE
28
Out
This signal's high level means that the
printer is out of paper.
13
SLCT
28
Out
Always at high level when the printer in
powered on.
Specifications, Command Summa y, and Character Tables
A-13