Tools / technique for boards with eMMC repair?

[CapLeaker]

Re: Tools / technique for boards with eMMC repair?

Well, I think I am better off to leave the IC installed and just go with wires direct to the programmer. Anyone know fast the CLK signal is? I measured something like 48MHz?

[SMDFlea]

Re: Tools / technique for boards with eMMC repair?

You can get some thin blades to slide under the bga,and some other blades to remove the glue around the outside
https://www.ebay.com/itm/15Pc-A8-A9-...l/253833603869

[CapLeaker]

Re: Tools / technique for boards with eMMC repair?

No missing pads, contact is good. Had it under my microscope today. I also tried playing with the voltages, which had the same result.

The biggest problem with eMMC is that they are so god damn thin, small and so many contacts it isn't funny. They bend in heat when you have to pry them off and away from the glue too.

[megaraider]

Re: Tools / technique for boards with eMMC repair?

Those e-MMCs are nothing but NAND Flash Memory, either MLC or TLC, with integrated memory management (much like a uSD card if you like), JEDEC compliant.
They do behave as an e-MMC to the 'outside world' and therefore most read/write adapters include a SD Interface.
The biggest problem being working with FBGA package sucks
If you're unable to read / write anything it's most likely due to poor connection (adapter insertion), missing pads or burned off when removed from circuit.
It's very unlikely to be empty (clean) since it holds the firmware...!

[CapLeaker]

My question is what kind of tools, programmers, hot air settings, techniques are you guys using to play with eMMC's? Any weird failure modes? These days eMMC is in a lot of devices and I should be getting some these devices on my bench.

I had a RCA smart tv main board in my junk bin that had some Toshiba eMMC FBGA153 on there. So I took it off in order to read it. It seems that these eMMC's aren't only soldered on, but also glued to the board? Anyway, I've probably had the board for 4 years kicking around in the pile, so that probably didn't do any good either. So I put it in the FBGA153 programmer, found the correct eMMC in the settings and? Nothing. The pins got detected correctly, but it is timing out for a read / write in all 3 modes 1bit/4bit/8bit. There was absolutely nothing to save in Boot 1 and 2, User etc. Always get the same error. I've tried to read them individually, no bueno.

Not sure if the eMMC was bad to start with, or i burnt it off (took like 3mins on 400C to get it off the darn board). It wouldn't move off the board easily, so I decided to jam my tweezers between the eMMC and the board and pry it off. That's how I noticed that the eMMC was actually glued on there.