I'm currently reversing a device that has a chip soldered I can't identify. It's next to its controller, and judging from its size and position, it could be SPI Flash. It's SOP-8.
Does someone know the type? Do you have a data sheet?
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It is indeed a 16M bit SPI flash chip made by Gigadevice Semiconductor Inc., a Beijing (China) based fabless semiconductor company.
Data sheet is available from their website.
answered Apr 15 '16 at 21:12
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The manufacturer logo looks unfamiliar to me, but that part number is very similar to that of a 16Mbit SPI flash, yes. Winbond Data Sheet
If you look at the pinout:
- I would bet that R93 is the CS# pull-up resistor,
- R94 is a series termination resistor on DO from the chip.
- R95 is probably tying off this pin to VCC to disable write protection
- Connected to what appears to be the surface ground plane
- Connected to external DI
- Connected to external CLK
- R5 is probably tying off this pin to VCC to disable write protection
- C10xx are decoupling on the power pin.
Here is the datasheet I referenced -- no guarantee the opcodes are the same, but I'd give it >90% chance that this is a lower-cost SPI flash that's supposed to be pin-compatible with the 25Q "family", so to speak.
answered Apr 15 '16 at 21:12