| Electronics > Repair |
| Mystery eMMC flash chip pinout? |
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| D Straney:
Had my phone (Teracube 2e) brick itself to an amazing degree recently, and while my backups are recent enough to not be disastrous, they're also far enough in the past that it would be really convenient to be able to pull the data off of it. Inspired by other stories of hooking up salvaged phone flash chips to SD card readers, I took the shields off the motherboard, but sadly this BGA I removed doesn't match any of the standard BGA flash pinouts shown here, for example: https://www.allsocket.com/en/ProductView.asp?ID=13 I'm pretty sure this is a multi-die package that has both the RAM and flash, as there's nothing else on the motherboard that "looks" right for any kind of memory (plus it's on the thick side): there's an MT6762 ARM SoC (which does not have any package-on-package stacking happening), and an MT6357 power management chip, and everything else is obviously either part of the RF section or way too small. Searching "PA090" hasn't turned up anything useful for me so far, and I don't recognize the logo. I may be just SOL, but wanted to check first in case anyone happened to recognize either the chip itself or the footprint. |
| DavidAlfa:
Yep, called MCP memory (Multi-Chip Package), probably eMMC+DDR4. This seems to be a BGA254 package. Check this datasheet: https://szrayson.com/uploadfiles/2020/05/20200521152233448.pdf I used one of these to repurpose a dead laptop emmc, worked nicely, shows as a card reader, no config required, just solder and use. https://www.aliexpress.com/item/1005004787516690.html |
| D Straney:
Wow, much appreciated, that all is exactly what I needed - will buy one of those adapters and try my BGA-soldering skills for the first time (or maybe just get scared and jump a few wires over based on that pinout). Looks like my chip is missing a couple of the balls on each side but is otherwise identical to that footprint. |
| fzabkar:
Spectek Laser Mark to Marketing Part Number Decoder: https://www.spectek.com/menus/mark_code.aspx --- Code: ---Mark Code Part Number Product Family ------------ -------------- ---------------- PA090 SUVJ9K8ZZAD8DQKSL ALL-IN-ONE MCP --- End code --- FCC filings for Teracube 2E: https://fccid.io/2AT6G-TERACUBE2E https://fccid.io/2AT6G-TERACUBE2E/Internal-Photos/Internal-photos-5005756.pdf (internal photos) https://fccid.io/2AT6G-TERACUBE2E/User-Manual/User-Manual-5005765.pdf (user manual) --- Code: ---Mark Code Part Number Product Family ------------ -------------- ---------------- PG022 SUVJ9D8ZZAD8DQKSM MASS FLASH/MOBILE SDRAM MCP --- End code --- SMVJ9D8ZZAD8DQKSM-062BT、SUVJ9D8ZZAD8DQKSM-053BT - 64GB: e.MMC and 32Gb: 4 x 8Gb, Dual-Channel LPDDR4X 254-Ball MCP: https://szrayson.com/uploadfiles/2020/05/20200521152454917.pdf (datasheet) |
| amyk:
Might be a bit too late to say this now but as that's a Mediatek-based smartphone, did you try using SPFlashTool to read the eMMC? Unless the SoC itself is dead, you should be able to use SPFlashTool to boot it into Preloader/BootROM mode and image the flash. |
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