In message 9e4733910802141038h16afb653l8b6c8a0181ea109f@mail.gmail.com you wrote:
I'm new to working on low level code like u-boot. Something I don't understand is why things like the Ethernet address are stored in eeprom instead of flash. Is this something to do with how boards are
This may have h/w design reasons. For example, you may want to have things like serial number, MAC address and other similar settings stick with a device even when you change the CPU module; in such situations it's much easier to place a EEPROM somewhere in the device itself; with a I2C bus you need only 3 wires. If you try to use NOR flash in a similar configuration, you have to route the full data and address bus and some other signals, which is much more expensive.
manufactured? From a high level perspective it doesn't seem to matter if eeprom or flash is used.
Well, it does matter. Flash is much more reliable. Read for example doc/I2C_Edge_Conditions what can (and does!) happen to I2C attached EEPROM devices. And with flash, we can even store the data redun- dantly, so you have really good reliability.
Best regards,
Wolfgang Denk