1.0mm breakout connector for the Teensy 4.0 uSD pads ?

[rjsdotorg]

Does anyone know of a basic 1.0mm breakout connector for the Teensy 4.0 uSD pads?
I'd soldered 30ga directly to the pads, but it's a pain.
Alternatively, the preferred uSD conn for the 4.0? tech doesn't call it out. What is on the 4.1?

https://www.adafruit.com/product/1660 ?

I've been using the Adafruit SDIO breakout board.

 

[PaulStoffregen]

HFW8R-1STE1H1LF Plenty are in stock at Digikey, Mouser, probably other places.

For more detail, check out the parts list and other info on this page.

Breakout Board for Teensy 4.0

www.pjrc.com

 

[rjsdotorg]

HFW8R-1STE1H1LF Plenty are in stock at Digikey, Mouser, probably other places.

For more detail, check out the parts list and other info on this page.

Breakout Board for Teensy 4.0

www.pjrc.com

Thanks, but HFW8R-1STE1H1LF at https://www.digikey.com/en/products/detail/amphenol-cs-fci/HFW4R-1STE1H1LF/9695130 is another item.
I think https://www.digikey.com/en/products/detail/hirose-electric-co-ltd/DM3D-SF/1786510 is the item?

I did find the "TF 8P Socket" in one of those link's pics, but only from China

 

[jmarsh]

Thanks, but HFW8R-1STE1H1LF at https://www.digikey.com/en/products/detail/amphenol-cs-fci/HFW4R-1STE1H1LF/9695130 is another item.

That's HFW4R (4 pin), you want HFW8R (8 pin), e.g. https://www.digikey.com/en/products/detail/amphenol-cs-fci/HFW8R-1STE1H1LF/9695136

 

[rjsdotorg]

That's HFW4R (4 pin), you want HFW8R (8 pin), e.g. https://www.digikey.com/en/products/detail/amphenol-cs-fci/HFW8R-1STE1H1LF/9695136

Those for flat cables I assume, like flat one the tall-dog uses. I see that it also uses the Molex 1051620001 which I might get.

 

[rjsdotorg]

I ordered the Molex 1051620001, so I'll test next week.

 

[BillFM]

I ordered the Molex 1051620001, so I'll test next week.

That part has a 1.1mm pitch. What you need is 1mm pitch.
Be prepared to do some bending.

 

[rjsdotorg]

That part has a 1.1mm pitch. What you need is 1mm pitch.
Be prepared to do some bending.

Shouldn't be too bad (I hope). I did not see the exact which is part on the 4.1... (?)
I also bought more SDIO breakouts

 

[rjsdotorg]

The Molex 1051620001 arrived and I soldered one on.
FYI this really calls for solder paste and a microscope.
I bent 1,2 & 7,8 inwards a tad, soldered and had to use wick to remove excess on a couple.

The mechanical issue is that the card rubs on the 2 SMDs


and needs tape under it so as not to contact various pads, as well as glue to hold it down securely.

I never did figure out what device was designed to go there, unless is was a ribbon connector.

 

[jmarsh]

I never did figure out what device was designed to go there, unless is was a ribbon connector.

That's exactly what is meant to go there, as used for the T4 breakout board.

 

[PaulStoffregen]

Impressive pin bending!

 

[rjsdotorg]

Impressive pin bending!

 

[rjsdotorg]

That's exactly what is meant to go there, as used for the T4 breakout board.

As someone pointed out, the part is 1.1mm pitch, while the pads are 1.0mm

 

[jmarsh]

As someone pointed out, the part is 1.1mm pitch, while the pads are 1.0mm

Huh? Feels like we're talking in circles here.
They were talking about the molex connector that you ended up buying. The flex ribbon connector that the pads are actually designed for is this one, which has 1.0mm pitch and is used with the breakout board.

 

[Pio]

Not the ideal solution, but in some situations might be enough - made this some time ago and have been using for over a year now.
T40 SDIO << link to github repo

 

[BillFM]

The Molex 1051620001 arrived and I soldered one on.
FYI this really calls for solder paste and a microscope.
I bent 1,2 & 7,8 inwards a tad, soldered and had to use wick to remove excess on a couple.
View attachment 38608View attachment 38610
The mechanical issue is that the card rubs on the 2 SMDs
View attachment 38609

and needs tape under it so as not to contact various pads, as well as glue to hold it down securely.

I never did figure out what device was designed to go there, unless is was a ribbon connector.

Is it my imagination, or, is the connector mounted 180 degrees the wrong way and now the SD signals are 180 degrees incorrectly connected to Teensy?

 

[rjsdotorg]

Is it my imagination, or, is the connector mounted 180 degrees the wrong way and now the SD signals are 180 degrees incorrectly connected to Teensy?

I had to think on that too


What Pio does with his (very nice) board is swap using 2 layers:

 

[rjsdotorg]

Not the ideal solution, but in some situations might be enough - made this some time ago and have been using for over a year now.
T40 SDIO << link to github repo

I wish they were for sale (?) I would have done that instead.
We have also ground down board edges to create castellations, but if pre-populated we used stripped 30ga as jumpers - Bill was worried about static during grinding:

(That was MSP430 based deep sea camera)

 

[BillFM]

Phew! Glad it worked out for you.

 

[rjsdotorg]

In my case, I'm happy to say that switching from the Adafruit SDIO SD board to the soldered-on simple holder on the Teensy 4.0 made all the difference.