Model 1221 Parallel Version - NCI 122X User Manual

Model 1221 Model 1221 Model 1221
Model 1221 Model 1221
P P P P P arallel V arallel V arallel V arallel Version arallel V ersion ersion ersion ersion
Pin No. Pin No. Pin No. Pin No. Pin No. Signal Signal Signal Signal 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
Direction Direction Direction Direction Direction
To printer
To printer
From printer
From printer
-
From printer
From printer
From printer
The rest are not used.
Description Description Description Description 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
high level.
Twisted pair return (For pins 1 to 11)
High = Out of paper.
High = printer selected.
Low level = Error condition.
18 18 18 18 18