Dangerous Prototypes

Other projects => Past projects => Breakout boards => Topic started by: thelonious on October 25, 2012, 03:24:13 am

Title: FT2232H breakout board repeatedly connecting/disconnecting
Post by: thelonious on October 25, 2012, 03:24:13 am
Hi there,

I just got my FT2232H breakout board and I'm seeing some odd behavior. I wanted to confirm, if possible if I have a bad board or if there's some setup I need to perform. Basically, the title says it all. I've connected the board to multiple OS X machines, a Win7 VM, an Ubuntu VM, and a Win7 laptop using multiple USB cables. In each case, the device repeatedly connects and disconnects. Any suggestions on how to resolve this?

Thanks,
Kevin
Title: Re: FT2232H breakout board repeatedly connecting/disconnecti
Post by: Sjaak on October 25, 2012, 07:52:30 am
Does it get better or worser if you tap/press the chips/components or usb connector?

Looks like a bad solderjoint to me
Title: Re: FT2232H breakout board repeatedly connecting/disconnecti
Post by: arakis on October 25, 2012, 09:20:40 am
[quote author="thelonious"]Hi there,

I just got my FT2232H breakout board and I'm seeing some odd behavior. I wanted to confirm, if possible if I have a bad board or if there's some setup I need to perform. Basically, the title says it all. I've connected the board to multiple OS X machines, a Win7 VM, an Ubuntu VM, and a Win7 laptop using multiple USB cables. In each case, the device repeatedly connects and disconnects. Any suggestions on how to resolve this?

Thanks,
Kevin[/quote]

There seems to be no reason for this to happen other then a bad solder joint... Contact Seeed with a link to this post, and ask for a replacement.
Title: Re: FT2232H breakout board repeatedly connecting/disconnecti
Post by: thelonious on October 25, 2012, 04:57:48 pm
After a closer look with a microscope, I found a solder bridge (my fault) between GND and -RESET, of all places. That's cleaned up and the board is working great now. Thanks guys.

-Kevin