July 13, 2024, 10:38:10 AM

Alternative eMMC Chip?

Started by kreyren, April 02, 2023, 01:58:14 AM

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kreyren

The current eMMC chip (MTFC16GAKAENA-4M) is too small (16GB) and too slow (150x30 MB/s) for me and i kinda want to use the sdcard slot for 3D printers and stuff :D

So i found:

https://www.digikey.cz/en/products/detail/micron-technology-inc/MTFC32GAPALNA-AAT/7918879

Datasheet: https://4donline.ihs.com/images/VipMasterIC/IC/MICT/MICT-S-A0006806196/MICT-S-A0006806196-1.pdf?hkey=52A5661711E402568146F3353EA87419

It says the the current consumption can go up to 150mA and i am not sure if the Rev.C of Teres-A64 Mainboard is able to provide that O.o

Optinally is there a better alternative? Ideally one from european supplier
* Community Lead Developer of TeresDevelopment
* Downstream Maintainer of Linux and BSD* compatibility for OLIMEX Teres-I
* World record holder in annoying Tsvetan with questions about OLIMEX Teres-I hacking

basicitstuff

Would there be room for a eMMC module like this one:
https://aliexpress.com/item/4000419649482.html?spm=a2g0o.ppclist.product.102.4c7eNGavNGavUf&pdp_npi=2%40dis%21EUR%21%E2%82%AC%2021%2C19%21%E2%82%AC%2021%2C19%21%21%21%21%21%40211b81a316805037241362894e0a8c%2110000001732493521%21btf&_t=pvid%3A7b06e175-f3d7-44f3-bbc1-af91a5b74645&afTraceInfo=4000419649482__pc__pcBridgePPC__xxxxxx__1680503724&gatewayAdapt

This would give more flexibility in capacity and speed? Not sure what the standard is for the eMMC module? I see more than one type of connector and this one seems pretty flat so I see no issue in it not fitting. The motherboard would need to be adapted to have a connector.

Can you exceed the 150x30 MB/s with an SDcard? If so what make and brand are you using?

kreyren

#2
Quote from: basicitstuff on April 03, 2023, 09:42:36 AMWould there be room for a eMMC module like this one:
https://aliexpress.com/item/4000419649482.html?spm=a2g0o.ppclist.product.102.4c7eNGavNGavUf&pdp_npi=2%40dis%21EUR%21%E2%82%AC%2021%2C19%21%E2%82%AC%2021%2C19%21%21%21%21%21%40211b81a316805037241362894e0a8c%2110000001732493521%21btf&_t=pvid%3A7b06e175-f3d7-44f3-bbc1-af91a5b74645&afTraceInfo=4000419649482__pc__pcBridgePPC__xxxxxx__1680503724&gatewayAdapt

Looking at the pinning on https://jlcpcb.com/partdetail/FORESEE-NCEMASLD32G/C520992 the chip seems incompatible with the board pinning, you want the following layout:



or making a daughter board that provides compatibility

Note that the 3 balls on each side are NC (Not Connected) and are there only for structural stability and can be unused if you find a chip that has just 88 balls and is pin-compatible

Quote from: basicitstuff on April 03, 2023, 09:42:36 AMThis would give more flexibility in capacity and speed? Not sure what the standard is for the eMMC module? I see more than one type of connector and this one seems pretty flat so I see no issue in it not fitting. The motherboard would need to be adapted to have a connector.

I am not sure myself how the eMMC handling works in A64 thus why am i asking here :D CC @LubOlimex?

Quote from: basicitstuff on April 03, 2023, 09:42:36 AMCan you exceed the 150x30 MB/s with an SDcard? If so what make and brand are you using?

The dimensions are seems to be 14x18mm, but consult the KICAD PCB files.
* Community Lead Developer of TeresDevelopment
* Downstream Maintainer of Linux and BSD* compatibility for OLIMEX Teres-I
* World record holder in annoying Tsvetan with questions about OLIMEX Teres-I hacking

kreyren

#3
Btw. the eMMC **MODULE** you linked from aliexpress.. I proposed replacing the eMMC pinning with socket for these to tsvetan a while ago, but he didn't like the idea for the OlinuXino's as the OLIMEX's consumers are using those in industrial settings for which the modules are not appropriate (the connectors are not secure enough and under vibration are likely to cause interrupts in data transfer)

Though thinking about it now it might not be a bad idea to add pinning for a daughter board that would enable the use of these modules so that the board would come with a soldered eMMC that you can unsolder and add daughter board to to use these modules

Proposed in https://github.com/OLIMEX/DIY-LAPTOP/issues/65
* Community Lead Developer of TeresDevelopment
* Downstream Maintainer of Linux and BSD* compatibility for OLIMEX Teres-I
* World record holder in annoying Tsvetan with questions about OLIMEX Teres-I hacking