Serial Pin-outs

2010-04-12T10:42:02Z

Kristinaboss:

=== RS-232 over DE-9 ===

{|
|-
|
Female
5 4 3 2 1
9 8 7 6
|
Male
1 2 3 4 5
6 7 8 9
|-
|}

1 DCD 
2 RXD 
3 TXD 
4 DTR 
5 GND 
6 DSR 
7 RTS 
8 CTS 
9 RI

Serial ports on common PC hardware have this pin-out.

=== RS-232 over DB-25 ===

{|
|-
|
Female
13 12 11 10 09 08 07 06 05 04 03 02 01
25 24 23 22 21 20 19 18 17 16 15 14
|
Male
01 02 03 04 05 06 07 08 09 10 11 12 13
14 15 16 17 18 19 20 21 22 23 24 25
|-
|}

2 TXD 
3 RXD 
4 RTS 
5 CTS 
6 DSR 
7 GND 
8 DCD 
12 SDCD 
13 SCTS 
14 STXD 
15 TCLK 
16 SRXD 
17 RCLK 
18 LL 
19 SRTS 
20 DTR 
21 RL/SQ 
22 RI 
23 CH/CI 
24 ACLK

The VT 320 has this pinout.

=== RS-232 over 8P8C (Sun) ===

{|
|-
|
Plug Top
1 2 3 4 5 6 7 8
Cable
|-
|}

1 RTS 
2 DTR 
3 TXD 
4 GND 
5 GND 
6 RXD 
7 DSR 
8 CTS

The Sun Netra, ascorbic-acid, has this pinout.

=== Black DE-9 Female to 8P8C Adapter ===

{|
|-
| DE-9 || 8P8C
|-
|1||6
|-
|2||1
|-
|3||5
|-
|4||4
|-
|5||2
|-
|6||3
|-
|7||7
|-
|8||8
|-
|}

The black adapter has this pinout.

=== Grey DB-25 Female to 8P8C Adapter ===

{|
|-
| DB-25 || 8P8C
|-
|2||3
|-
|3||4
|-
|4||8
|-
|5||1
|-
|6||7
|-
|7||5
|-
|7||6
|-
|8||7
|-
|20||2
|-
|}

=== Grey DB-25 Male to 8P8C Adapter ===

{|
|-
| DB-25 || 8P8C
|-
|2||6
|-
|3||8
|-
|4||5
|-
|5||4
|-
|6||1
|-
|7||3
|-
|7||7
|-
|20||2
|-
|}

=== Dumbterm Cable ===

{|
|-
|||DE-9 || 8P8C || 8P8C || DB-25
|-
|DCD||1||6||7||8
|-
|RXD||2||1||4||3
|-
|TXD||3||5||3||2
|-
|DTR||4|||4||2||20
|-
|GND||5||2||5||7
|-
|DSR||6||3||X||6
|-
|RTS||7||7||8||4
|-
|CTS||8||8||1||5
|-
|}

{|
|-
| ||DE-9 end || DB-25 end
|-
|1||Gr/W||Br
|-
|2||Gr||Bl
|-
|3||Or/W||Bl/W
|-
|4||Bl||Gr/W
|-
|5||Bl/W||Gr
|-
|6||Or||X
|-
|7||Br/W||Or
|-
|8||Br||Br/W
|-
|}

This cable is used to connect a DB-25 DTE port to a DE-9 DTE port using some non-standard adapters.

=== Almost Rollover Cable ===

{|
|-
|| 8P8C || 8P8C
|-
|1||8
|-
|2||7
|-
|3||6
|-
|4||4
|-
|5||5
|-
|6||3
|-
|7||2
|-
|8||1
|-
|}

This cable uses the Sun pinout, with a minor modification: the two GND wires are connected straight through. With DE-9<->8P8C modular jacks, you cannot connect the DE-9 GND to both GND pins of the 8P8C end (i.e., you can't stick two pins in one hole). Connecting using a standard rollover is fine when connecting e.g. the Netra to a DE-9, but if two DE-9s are connected via a standard rollover, GND will be an open circuit. The "almost" rollover connects the two GND lines straight through to avoid this problem. The module jacks we have now use 8P8C pin 4 for GND.

The two cables we have with this pinout are labeled "Serial 87645321".

===Half-Cables ===

Light Serial Mouse

2 green 
3 brown 
4 pink 
5 yellow 
7 white

Dark Serial Mouse

2 white 
3 light brown 
4 brown 
5 black 
7 blue

Metal End

2 green 
3 yellow 
5 black 
6 red 
7 brown 
8 white

=== External Links ===
* [http://www.bestdissertation.com/services/dissertation.html thesis writing]
* [https://www.conserver.com/pipermail/users/2002-July/msg00003.html Sun Serial Port Pin-out]
* [http://www.zytrax.com/tech/layer_1/cables/tech_rs232.htm Standard Cable Pin-outs]

[[Category:Hardware]]

CSCWiki - User contributions [en]

Serial Pin-outs