Serial connector pinouts!

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Eko
DD-WRT Developer/Maintainer


Joined: 07 Jun 2006
Posts: 5772

PostPosted: Wed Mar 21, 2007 15:14    Post subject: Serial connector pinouts! Reply with quote
Serial connector pinouts!

For those interested: (--------- is nearest board edge)

Buffalo WBR2-G54(S)

Code:
----------
 J5
 o gnd
 o vcc
 o rx
 o tx


Motorola WR850G v2 /v3
Code:

| tx o o vcc  RJP1
|    o o
|    o o gnd
| rx o o
|    o


Buffalo WLA2-G54C
Code:

| tx o o
|    o o vcc
|    o o gnd
| rx o o
|    o
---------


Linksys WRT-54G(S) JP1 or JP2 (on newer models)
Code:

vcc o o vcc |
tx1 o o tx0 |
rx1 o o rx0 |
    o o     |
gnd o o gnd |


Asus WL-500 deluxe
Code:

|     o o
| gnd o o vcc
| tx1 o o tx0
| rx1 o o rx0   
|        J5


Last edited by Eko on Wed May 16, 2007 4:35; edited 2 times in total
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jnjn
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Joined: 07 Jun 2006
Posts: 448
Location: PRC

PostPosted: Tue Apr 17, 2007 18:51    Post subject: Reply with quote
what's the signal then?
ttl or rs232? Question
Eko
DD-WRT Developer/Maintainer


Joined: 07 Jun 2006
Posts: 5772

PostPosted: Wed Apr 18, 2007 15:06    Post subject: Reply with quote
jnjn wrote:
what's the signal then?
ttl or rs232? Question

ttl
cdkiller
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Joined: 26 Jun 2007
Posts: 261
Location: Trinidad & Tobago

PostPosted: Sat Apr 11, 2009 2:52    Post subject: Reply with quote
I have a question about the serial port on the WHR-G125. I read the wiki page and saw the pinouts but I need to get something clarified. I have read that the TX and RX pins work with 3.3V logic levels so my question is if the Vcc pin on the WHR-G125 board also means +3.3V? I just want to be sure because I bought a device that can supply both +5V and +3.3V and I don't want to end up destroying my router. Common sense tells me the Vcc on the router board is also +3.3V but I need to be sure. This +3.3V Vcc is to power the chip while it is being used by the cable? Does this mean you don't need to power up the router to use it?
Thanks.

In case anyone was wondering I bought this USB to Serial adapter to make life easier so I could avoid using MAX232 chip and an actual serial port since my laptop does not have one.

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russg
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Joined: 03 Aug 2008
Posts: 80

PostPosted: Sat Apr 11, 2009 4:32    Post subject: Reply with quote
cdkiller wrote:
In case anyone was wondering I bought this USB to Serial adapter to make life easier so I could avoid using MAX232 chip and an actual serial port since my laptop does not have one.


I looked at the MAX232 but went with the FTDI TTL-232R-3v3 and order it from Mouser Electronics.

The nice thing about the FTDI is the cable is done and you can take the pin connectors out of the cable end, rearrange them or use them individually. You can also download a tool from FTDI to flip the pins in/out nature etc. It is a bit more than the MAX232 but I find the cable, ends, and versatility make up for the few bucks more.
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