SUN LX/Classic/SS4/5/10/20 Serial Port

Latest revision as of 16:26, 28 March 2007

This port is located in not-so modern SUN Sparcs such as SUN LX/Classic/SS4/5/10/20 and has both serial ports (A/B) in the same connector. Simply plugging in a regular serial cable in results in accessing port A.

Pinout

25 PIN D-SUB FEMALE at the computer.

Pin	Name	Port	Dir	Description
2	TXD	A		Transmit Data
3	RXD	A		Receive Data
4	RTS	A		Request to Send
5	CTS	A		Clear to Send
6	DSR	A		Data Set Ready
7	GND	-	-	System Ground
8	CD	A		Carrier Detect
11	DTR	B		Data Terminal Ready
12	CD	B		Carrier Detect
13	CTS	B		Clear to Send
14	TXD	B		Transmit Data
15	TC	A		Transmit Clock from DCE, usually not used
16	RXD	B		Receive Data
17	RC	A		Receive Clock from DCE, usually not used
18	TC	B		Transmit Clock from DCE, usually not used
19	RTS	B		Request to Send
20	DTR	A		Data Terminal Ready
21	TCO	A		Transmit Clock from DTE, usually not used.
25	TCO	B		Transmit Clock from DTE, usually not used.

Notes:

• Direction is DTE (Computer) relative DCE (Modem).
• Do not connect SHIELD(1) to GND(7).

Contributions

• Niklas Edmundsson

Sources

• SUN Field Engineer Handbook, VolumeII, 12/15/93