What is the connector for the UART?

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frohro
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What is the connector for the UART?

Unread post by frohro » Mon Dec 22, 2014 9:09 am

Hi All,

I have plenty of USB to TTL converters and would like to make my own cable for the odroid c1 UART. What is the mating connector part number and manufacturer for the UART?

Thanks,

Rob

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odroid
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Re: What is the connector for the UART?

Unread post by odroid » Mon Dec 22, 2014 10:31 am

The mating connector information is avaiable on the WiKi.
http://odroid.com/dokuwiki/doku.php?id=en:c1_hardware

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Re: What is the connector for the UART?

Unread post by frohro » Mon Dec 22, 2014 11:23 am

Thanks! That is just what I needed!

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Re: What is the connector for the UART?

Unread post by pppdiv » Mon Dec 22, 2014 12:55 pm

I have few cp2102 usb ttl converters but will it have any issue with voltage. I thought they will have 3-5v on signal lines and odroid expects 1.8v.

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Re: What is the connector for the UART?

Unread post by frohro » Mon Dec 22, 2014 1:01 pm

On the C1, which this forum is for, it say 3.3V for the UART. See the same page on the wiki!
http://odroid.com/dokuwiki/doku.php?id=en:c1_hardware
On the other hand, other odroids do use 1.8V, so be careful. All I have is a C1.

Rob

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Re: What is the connector for the UART?

Unread post by odroid » Mon Dec 22, 2014 1:23 pm

Yes, ODROID-C1 has 3.3Volt interface while other ODROIDs have 1.8Volt IO.

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Re: What is the connector for the UART?

Unread post by pppdiv » Mon Dec 29, 2014 2:58 am

Thanks everyone I tried the cp2102 usb serial converters I bought from ebay and it worked well on Odroid C1. Also I had few female headers which I use for gpio pins. It was a little tight to push that through the connector on Odroid C1 as I didnt have the molex mating connector. But once connected everything was perfect.

Connection Diagram
Pin 4 - Gnd
Pin 3 - Tx
Pin 2 - Rx
Pin 1 - Not connected

After connecting like this I was able to see the boot messages and shutdown messages on my host pc.

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Re: What is the connector for the UART?

Unread post by odroid » Mon Dec 29, 2014 10:27 am

Can you post a picture you made the connection?
Many people will be happy who forgot to buy our USB-UART kit. ;)

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Re: What is the connector for the UART?

Unread post by cngdxd » Tue Jan 06, 2015 11:10 pm

pppdiv wrote:Thanks everyone I tried the cp2102 usb serial converters I bought from ebay and it worked well on Odroid C1. Also I had few female headers which I use for gpio pins. It was a little tight to push that through the connector on Odroid C1 as I didnt have the molex mating connector. But once connected everything was perfect.

Connection Diagram
Pin 4 - Gnd
Pin 3 - Tx
Pin 2 - Rx
Pin 1 - Not connected

After connecting like this I was able to see the boot messages and shutdown messages on my host pc.
which Pin is Pin1? near by UART lable?

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Re: What is the connector for the UART?

Unread post by odroid » Tue Jan 06, 2015 11:59 pm

No.. the other side.

To make it more clear...
On the bottom side of PCB, there is one rectangular soldering pad and three round pads.
The rectangular one is pin#1. ;)

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Re: What is the connector for the UART?

Unread post by cngdxd » Wed Jan 07, 2015 4:50 pm

odroid wrote:No.. the other side.

To make it more clear...
On the bottom side of PCB, there is one rectangular soldering pad and three round pads.
The rectangular one is pin#1. ;)
__UART____
|Pin 4 - GND|
|Pin 3 - RXD|
|Pin 2 - TXD|
|Pin 1 - VCC|
\_________|

3.3V LVTTL

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Re: What is the connector for the UART?

Unread post by odroid » Wed Jan 07, 2015 4:53 pm

cngdxd wrote: __UART____
|Pin 4 - GND|
|Pin 3 - RXD|
|Pin 2 - TXD|
|Pin 1 - VCC|
\_________|

3.3V LVTTL
Perfect!
Picture is much better than words. :D

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