Hong Wang made the day before yesterday semiconductor article, "ICMAX teach you to re-use bad cell phone eMMC" little friends on how to re-use eMMC chip is generally more interested in, just to have a friend around today's set-top box is broken, want to extract inside the data on hand just to have a card reader, give him to make a U disk to share to you, the end of the text has prompted considerations oh.
Earlier said some things to note: demolition emmc chips, if desired, hot air welding gun to come out, I used a soldering iron 30w, the head must be pointed only easy to weld, dismantle mobile phone charger wire inside a small transformer just fine. After doing must be carefully examined do not short circuit and do not Weld (short circuit may then burn chip oh), once successful, plug in the computer, do not need perfect recognition directly driven by mass production.
Do not have professional tools junior partner, you can prepare in advance a few things:
1, to prepare a reader sd card or tf card;
2, earphone wire, broken headphone cable can be stripped out;
3, from mobile phones or set-top boxes welded down on other electronic devices EMMC memory chip.
Step 1: Pressing pin-Hong Wang FIG enameled wire are connected with the semiconductor below the card reader slot emmc 
Step two: in sequence and is GLK CMD GND VCC DAT2 DAT1 DAT0 DAT3 , and the corresponding figure is the order of TF card slot, According to this enameled wire connected on the line. 
Step Three: wire connected to the physical slot in the card reader of FIG.
The following is taken in kind:
FIG at block for the required chip eMMC
Taken down from the PCB eMMC, following FIG.
eMMC after welding success
This is successful on the fly line, a glue stick, or a transparent adhesive to stick to the reader emmc it. Then the computer will be able to insert as a normal U disk to use, how durable than ordinary TF card ah. 
In fact, bad cell phone, smart stereos, smart watches in the memory can be can get down to do disk to use U, especially large phone memory, such as 32G, 64G, and make a U-figured waste recycling, and overall to say it is quite simple, just to have a good grounding soldering iron on the line.
Hong Wang semiconductors here, too, need a little reminder that not every player can be successful, ready to do trial and error, reading the above process, I have a list of questions which this process occurs:
( 1) which welding step is unsuccessful or flawed, eMMC chip waste, it is recommended to start with small capacity;
(2) may be converted into a U-disk read, the memory capacity greatly diminished, U is recommended to download the disk formatting of a HP tools after formatting, the normal capacity;
(3) read and write slow, unconventional, it is recommended for a control board, the memory chip can be re-planted soldering, and if successful, the computer may directly recognize the right capacity and reading speed will be normal.
Today, Wang wang semiconductor and share here, and for the steps and encountered do not understand can ask us, welcome attention to Wang Wang semiconductor ICMAX!