Serial port signals – Tektronix 220e User Manual
Page 106
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Technical Notes
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Phaser 220i and Phaser 220e Color Printers
Serial port signals
The table shows the Phaser 220i and Phaser 220e serial port's connected pins.
The other pins are not connected.
Serial port signal descriptions
Signal name
Pin number
Printer I/O
Description
SGnd
1
-
Shield ground
TxData
2
Out
Transmitted data
RxData
3
In
Received data
RTS
4
Out
Request to end
CTS
5
In
Clear to send
DSR
6
In
Data set ready
Gnd
7
-
Signal ground
DCD
8
In
Data carrier detect
DTR
20
Out
Data terminal ready
RI
22
In
Ring indicator
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