Can I solder a 3.3v SPI NOR flash chip to the 8 pin header on the board? The pinout looks correct for such a chip and there’s 3.3V on the correct power pin. Will the 1.0.5 software notice the chip and make it available as a MTD device or similar?
If not, what type of chip is appropriate for that header.
It’s for EMMC style memory, search for symbol shown on schematics of board.
Cool, thanks. Any idea if I were to populate it would it be recognized by the current build of Linux?
Thank you. That looks oddly like SDIO connected WiFi, but it might be worth a try. I wonder if I can connect another uSD card to these signals. That might be a bit easier to do. It would be an interesting test at least.
Thanks again for your help.
On V1.2, it is SD NAND, and the IOB board can be welded with NOR FLASH W25Q256, which is usable. But to use NAND FLASH W25N01, a resistor needs to be welded, but the official tag number map has not been released
I’m looking at v1.2 schematic and I’m confused.
It shows connections which are parallel with SD slot.
I ask if to be sure I cannot use soldered SD NAND and SD card simultanously?
No you cannot use both. As you noticed, they share all the same signals.
Well, that’s unfortunate. I guess this pad is just wasted space as long as the uSD socket is in use.