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Model 1251
Parallel Version
Pin No. Signal
1
Data Strobe
2
Data Bit 1
3
Data Bit 2
4
Data Bit 3
5
Data Bit 4
6
Data Bit 5
7
Data Bit 6
8
Data Bit 7
9
Data Bit 8
10
Acknowledge
11
BUSY
16-29
0 Volts
12
0 Volts
13
+5v
32
+5v
24
Direction
To printer
To printer
From printer
From printer
high level.
-
From printer
From printer
From printer
The rest are not used.
Model 125X MiniPrinter Series User's Manual
Description
Samples input data when held
low for 10 microseconds.
Indicates input data.
High level indicates "1" and
low level "0".
Indicates character input
completion at
low level.
Indicates data cannot be
received at
Twisted pair return (For pins 1
to 11)
High = Out of paper.
High = printer selected.
Low level = Error condition.
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