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Interface Specifications
Handshaking
Handshaking by DTR signal or X-on/X-off. The DTR signal
changes to mark-meaning the printer is not ready to receive
data-when the number of bytes free in the input buffer goes
down to 256. The signal changes to space-meaning that the
printer is now ready-when the number of bytes free in the
input buffer rises to 528.
Error handling
All errors are ignored.
Connector
6-pin DIN connector.
In this table, the direction of signals is given relative to the printer.
Pin number
Signal
1
TXD
2
DTR
3
RXD
4
NC
5
SG
6
FG
Signal
direction
Description
out
out
in
-
-
Transmits data for X-on/X-off
Whether or not the printer is ready
to receive data
Receives data
Not used
Signal ground level
1
Printer chassis ground
The pins are arranged as shown below.
8-10