PC serial (25 pin) pinout

serial interface

25 pin D-SUB male connector
at the computer

Pin	Name	Dir	Description
1	SHIELD	-	Shield Ground
2	TXD		Transmit Data
3	RXD		Receive Data
4	RTS		Request to Send
5	CTS		Clear to Send
6	DSR		Data Set Ready
7	GND	-	System Ground
8	CD		Carrier Detect
9	n/c	-
10	n/c	-
11	n/c	-
12	n/c	-
13	n/c	-
14	n/c	-
15	n/c	-
16	n/c	-
17	n/c	-
18	n/c	-
19	n/c	-
20	DTR		Data Terminal Ready
21	n/c	-
22	RI		Ring Indicator
23	n/c	-
24	n/c	-
25	n/c	-

Note: Direction is
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Pinouts.ru > RS-232 and other serial ports and interfaces pinouts listing > Pinout of PC serial (25 pin) and layout of 25 pin D-SUB male connector	Document status:	correct
Source(s) of this and additional information: Hardware Book	1 reports
Last updated at Sat Jun 25 2005. Submit additions or corrections for this document.	Is this document correct or incorrect? What is your opinion?

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