RE: [avr-chat] Trouble with ATMEGA 1280 extended fuse byte

[Eric Weddington]

Hi Bernard,

Your best bet is to send this issue to avr AT atmel.com and see if they know
what's going on here.

Thanks,
Eric Weddington


> -----Original Message-----
> From: address@hidden
> [mailto:address@hidden
>  On Behalf Of Bernard Fouché
> Sent: Monday, August 20, 2007 5:47 AM
> To: address@hidden
> Subject: [avr-chat] Trouble with ATMEGA 1280 extended fuse byte
>
> Hi List.
>
> I have the following problem:
>
> - I use an "ATMEGA1280 V 8AU 0622".
>
> - ATMEGA1280 data sheet (2549K-AVR-10/07) says (table 151, page 343)
> that only the lower 3 bits of the extended fuse byte can be
> programmed
> and all other bits should be '1'. IMHO it means that
> acceptable values
> are from 0xF8 to 0xFF.
>
> - When I try to set my fuses to 0xFD (to have Brown-Out
> Detection (BOD)
> at 2.7volts, see table 27 page 60), avrude complains that
> while it wrote
> 0xFD, it reads 0xF5.
>
> - When using AVRSTUDIO4, I also read 0xF5 for this fuse byte.
>
> - 0xF5 is 11110101 -> bit 3 is zero, not one.
>
> Did I miss something obvious or is the datasheet wrong? If
> so, what bit
> 3 means ?
>
> Thanks!
>
>   Bernard
>
>
> _______________________________________________
> AVR-chat mailing list
> address@hidden
> http://lists.nongnu.org/mailman/listinfo/avr-chat
>