Hi! > > I have many systems including SoC here, but technology needed for NAND > > flash is different from technology for CPU, so these parts do _not_ > > share a silicon die. They do not even share same package. (Also RTC > > tends to be on separate chip, connected using i2c). > > NAND flash requires ECC so is likely to be async. > But I2C is clocked from the cpu end - so is fixed.
RTC i2c may be clocked from the CPU end, but the time source needs to
work when machine is off, so that has a separate crystal for
timekeeping.
> Also an embedded system could be booting off a large serial EEPROM.
> These have fixed timings and are clocked from the cpu end.
Have you seen such system running Linux?
Best regards,
Pavel
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