Parallel Interface - Tally DT-230 User Manual

Tally Dascom DT-210/230

5.2.5 Parallel interface

Parallel interface pin assignment
Parallel interface with 36 pin CENTRONICS socket.
Signal From
Pin No.
1 H
2 H
3 H
4 H
5 H
6 H
7 H
8 H
9 H
10 P
11 P
12 P
－
13
－
14
－
15
16
17
－
18
19~30
－
31
32 P
33
－
34~35
36
Note:
H indicates that signal comes from Host computer; P indicates that signal comes from Printer.
Parallel interface connector diagram
Description
STB Signal; Data latch pulse, latch the data to the
printer at the rising edge of the negative pulse.
Data 0 (The lowest bit)
Data 1
Data 2
Data 3
Data 4
Data 5
Data 6
Data 7 (The highest bit)
ACK Signal; Printer response signal, indicates that
the printer has received the last byte of data; A
negative pulse of about 1us.
Busy Signal; The printer is busy; High level indicates
that the printer can't receive data.
PE Signal; Paper end signal; High level indicates that
the printer is paper end.
Unconnected
Unconnected
Unconnected
Logic Ground
Frame Ground, separated from logic ground.
Unconnected
Logic Ground
Unconnected
Printer error signal, low level indicates that error
occurs in the pprinter; The error signal will output
along with paper end signal.
Logic Ground
Unconnected
Unconnected
31