Ml182/183
Super-Speed Serial Interface Signal
Requirements:
Pin
Signal
Descri
Frame Ground
FG
Ground
Connected to the printer
frame.
2 Transmit Data
TD
From Ptr
Transmits serial data
from
the printer in X-ON/X-OFF
protocol.
3 Receive Data RD To Ptr Serial data received by the
pri nter.
4 Request to
Send
RTS
From
Ptr
In
Printer Ready/Busy
protocol indicates printer
not
ready to receive data.
6 Data
Set
Ready
DSR
To Ptr Tells the printer the
computer
is
ready to send
data. The printer receives
data after
confirming
this
signal
as
high
(+).
7
Signal
Ground
SG
Ground
Ground
11
Supervisory
Send
Data
SSD
From
Ptr
Indicates the printer
is
ready to receive data in
Printer Ready/Busy
protocol.
20 Data Terminal
Ready
DTR From Ptr Indicates the printer
is
not
ready to receive data in
Printer Ready/Busy
protocol.
In
addition
to
the
cable,
this
serial
interface
has a
piggyback
circuit
board
that
must
be
installed
in
the
printer.
On
the
board
are
16
function
switches
(two
sets
of
eight
switches)
that
you
may
have
to
reset
depending
on
the
model
computer
you
connect
to
the
printer.
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