capo349
Posts: 5
Joined: Thu May 24, 2018 5:46 pm

Conxion sd card to module computer CM3+

Fri Dec 20, 2019 7:18 pm

Hi, how did I get a CM3 + computer module?
I am trying to connect an External sd to be able to store files there and I have two questions about it

1. This pin map shows two possibilities of connecting the SD I want to know where it connects correctly
https://elinux.org/RPi_BCM2835_GPIOs

2. What software configuration should be done according to the connection of the pins

at this moment the sd is connected to the datashet pins of the cm3 + module

W. H. Heydt
Posts: 14746
Joined: Fri Mar 09, 2012 7:36 pm
Location: Vallejo, CA (US)

Re: Conxion sd card to module computer CM3+

Fri Dec 20, 2019 8:55 pm

Which model of CM3+ do you have? Only the CM3L+ has provision for an SD card interface. On the other versions, that interface goes to the on-board eMMC flash storage.

capo349
Posts: 5
Joined: Thu May 24, 2018 5:46 pm

Re: Conxion sd card to module computer CM3+

Fri Dec 20, 2019 11:18 pm

There are two versions according to the documentation module computer cm3 + is more complete than cm3 Lite

I have the CM3 +

W. H. Heydt
Posts: 14746
Joined: Fri Mar 09, 2012 7:36 pm
Location: Vallejo, CA (US)

Re: Conxion sd card to module computer CM3+

Sat Dec 21, 2019 2:59 am

capo349 wrote:
Fri Dec 20, 2019 11:18 pm
There are two versions according to the documentation module computer cm3 + is more complete than cm3 Lite

I have the CM3 +
There are 4 versions of the CM3+. The CM3L+ has no on-board eMMC. The other three models have 8GB, 16GB or 32GB of eMMC flash. Do you have a CM3L+ or one of the ones with on-board eMMC flash storage?

capo349
Posts: 5
Joined: Thu May 24, 2018 5:46 pm

Re: Conxion sd card to module computer CM3+

Sun Dec 22, 2019 3:32 pm

I don't have the cm3 + lite

I have the cm3 + this has the possibility of connecting an external sd card.
Here is the reference.
https://www.raspberrypi.org/products/co ... le-3-plus/

W. H. Heydt
Posts: 14746
Joined: Fri Mar 09, 2012 7:36 pm
Location: Vallejo, CA (US)

Re: Conxion sd card to module computer CM3+

Sun Dec 22, 2019 9:35 pm

capo349 wrote:
Sun Dec 22, 2019 3:32 pm
I don't have the cm3 + lite

I have the cm3 + this has the possibility of connecting an external sd card.
Here is the reference.
https://www.raspberrypi.org/products/co ... le-3-plus/
Yes, the CM3L+ can boot from an SD card. Indeed, unless you flash to right OTP bit, it has to.

capo349
Posts: 5
Joined: Thu May 24, 2018 5:46 pm

Re: Conxion sd card to module computer CM3+

Tue Dec 24, 2019 12:51 pm

Ok podrías indicarme como debo configurar la imagen

nomdediot
Posts: 52
Joined: Sat Feb 02, 2013 3:04 pm

Re: Conxion sd card to module computer CM3+

Fri Jan 03, 2020 10:52 am

With cm3 and cm3+ you can also extend the storage with an external SD card connected to GPIO 22 to 27. See also https://www.raspberrypi.org/forums/view ... 8&t=257309

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