AVR-Chat

On Feb 29, 2004, at 10:11 PM, Kathy Quinlan wrote:

>
> Can I emulate easily an EEPROM with an AVR ?
>
> Problem: I have an Atmel USB DEV kit, it will not program the EEPROM 
> via
> the parallel port like it should. Atmel have taken 3 months soo far and
> still it is not resolved.
>
> I need to get an urgent job done, so I was thinking of using an 8515 or
> Mega128 to emulate the EEPROM and download the code via RS-232.
>
> The EEPROM is an AT25HP256, it is not the EEPROM that is faulty, it is
> the GAL on the BOARD :o( (I wish they would email me the code for it
> then I could knock something up.
>
> The two options I am toying with :
>
> #1 an AVR emulates the EEPROM
>
> #2 the AVR programs the EEPROM and then tri states after programming so
> that the EEPROM is connected to the DEV board

How about using an AVR to program a SRAM, then connect that to your
development board?

ROM emulators used to be fairly common...

Mike