Ficara Emilio Pietro Giovanni ~ My Android tablet has removable SPI flash
After two rom upgrades with wrong files, my tablet's SPI flash was unable to run again a new upgrade, so I decided
to create a removable SPI flash that can be reprogrammed externally. Now my tablet can't be "bricked" anymore. If something
wrong happens, I simply store a fresh copy of U-Boot on the SPI flash and start again...
(click on images to enlarge)
Well, I used a microSD adapter like this...
then, with small cutter I opened the adapter...
and soldered the small 8 pin SOIC spi-flash memory to the contacts, using 0.2mm enamelled wires.
After that, I closed the adapter using cyanoacrylate glue. The plastic over the memory was removed for
making contact available for electrical inspection and thickness oversize.
Next step was to build a programmer using an SD card socket as connector. I used the same schematic
you can find in my page ->here<-
As final step, I soldered another SD card socket in the tablet, connecting the contacts to the pads of the removed IC
with small 0.2mm enamelled wires. That's all. After spi-flash reprogramming, the tablet started again looking for
microSD card with the upgrade firmware.