AMCC440EP Boot Source

AMCC440EP Boot Source

[Dick Hollenbeck]

We are looking at the yosemite design but want a CF2 socket for the OS 
image.   Can U-Boot reside in the EEPROM accessible via I2C?  

This would allow us to remove the flash entirely in favor of the CF2 
flash.  If yes, are there any drawbacks to this vs. keeping a small bit 
of flash soldered to the board?


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Re: AMCC440EP Boot Source

[Stefan Roese]

Hi Dick,

On Tuesday 01 November 2005 16:31, Dick Hollenbeck wrote:
> We are looking at the yosemite design but want a CF2 socket for the OS
> image.   Can U-Boot reside in the EEPROM accessible via I2C?

No. 440EP definitely can't boot from I2C EEPROM! With CF2 you mean 
CompactFlash, right?

> This would allow us to remove the flash entirely in favor of the CF2
> flash.  If yes, are there any drawbacks to this vs. keeping a small bit
> of flash soldered to the board?

Keep the small NOR FLASH and save yourself a lot of trouble. 256kB is enough 
in most cases.

By the way: This is off topic here and should be asked in the U-Boot list.

Best regards,
Stefan

RE: AMCC440EP Boot Source

[Steven Blakeslee]

> We are looking at the yosemite design but want a CF2 socket=20
> for the OS=20
> image.   Can U-Boot reside in the EEPROM accessible via I2C? =20

Are you sure that the 440EP can run code from the EEPROM on the I2C?
The 440EP loads configuration information from the EEPROM on the I2C but
I don't know it can run code.=20

>=20
> This would allow us to remove the flash entirely in favor of=20
> the CF2 flash.  If yes, are there any drawbacks to this vs.=20
> keeping a small bit of flash soldered to the board?

I'm pretty sure you need to have flash.  If you don't want the onboard
flash you can connect some through the PCI.