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: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] > On Behalf Of Bernard Fouché > Sent: Monday, August 20, 2007 5:47 AM > To: [email protected] > 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 > [email protected] > http://lists.nongnu.org/mailman/listinfo/avr-chat > _______________________________________________ AVR-chat mailing list [email protected] http://lists.nongnu.org/mailman/listinfo/avr-chat
