Pin no. signal direction description – Salter Brecknell 1200 Series User Manual
Page 23
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Model 122X MiniPrinter User’s Manual
23
Model 1221
Parallel Version
Pin No. Signal
Direction
Description
1
Data Strobe
To printer
Samples input data when held low
for 10 microseconds.
2
Data Bit 1
3
Data Bit 2
4
Data Bit 3
5
Data Bit 4
Indicates input data.
6
Data Bit 5
To printer
High level indicates “1” and
7
Data Bit 6
low level “0”.
8
Data Bit 7
9
Data Bit 8
10
Acknowledge From printer
Indicates character input completion
at low level.
11
BUSY
From printer
Indicates data cannot be received at
high level.
16-29
0 Volts
-
Twisted pair return (For pins 1 to 11)
12
0 Volts
From printer
High = Out of paper.
13
+5v
From printer
High = printer selected.
32
+5v
From printer
Low level = Error condition.
The
rest
are not
used.
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