Killertechno
Posts: 192
Joined: Wed Jan 02, 2013 8:28 am

Add microSD to CM: available controller in SOIC/TSSOP or similar?

Mon Jan 13, 2020 4:53 pm

Hi to all users!
I would like to add externam microSD for storage purposes (CM1 or CM3).
There are several controllers but cases are not so easy to remove without specific instruments (if damaged).
I've seen controllers in SOIC package some time ago but meanwhile are obsolete devices so not available.
I'm searching for something I can repair (for prorotypes, then I'll move to actual devices) and desolder in easy way (so TSSOP, SOIC or similar).
I only found GL823 (not available from european suppliers and no documentation available).
Do somebody know something similar or do you suggest some specific controller?
Thanks.

trejan
Posts: 1106
Joined: Tue Jul 02, 2019 2:28 pm

Re: Add microSD to CM: available controller in SOIC/TSSOP or similar?

Mon Jan 13, 2020 5:11 pm

Are you already using both SD controllers in the SoC?

Killertechno
Posts: 192
Joined: Wed Jan 02, 2013 8:28 am

Re: Add microSD to CM: available controller in SOIC/TSSOP or similar?

Mon Jan 13, 2020 6:06 pm

Hi treijan,
no, I would like to use eMMC for OS (on CM1 or CM3), then additional microSD only for storage to not loose data if CM will get damageds (to be removed only for emergencies).

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Frederir
Posts: 9
Joined: Tue May 24, 2016 12:28 pm
Contact: Website

Re: Add microSD to CM: available controller in SOIC/TSSOP or similar?

Wed Jan 15, 2020 4:50 pm

I would like to use eMMC for OS (on CM1 or CM3), then additional microSD only for storage
For this you don't need an external controller, the compute module can drive an external SDCARD (but can not boot from it). I used SD0 on GPIO[22..27] for this purpose and it works well.
Custom board design based on RPI or other : http://www.aptustech.com/

Killertechno
Posts: 192
Joined: Wed Jan 02, 2013 8:28 am

Re: Add microSD to CM: available controller in SOIC/TSSOP or similar?

Wed Jan 15, 2020 5:36 pm

I was planning USB interface to create separate board with all USB devices (microSD, wireless card....), starting from only microSD.

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