Another question about fuses.Where are they located,physically?

Other Hardware 3rd Party Boards
1

Hello!
I understand the fuse settings and their functions, but I have a really hard time understanding their location. When I search around all I can find is that they are in something like a fourth type of memory and such.
I would really appreciate a link, a picture 8) or directions in a datasheet.

Thanks in advance.

Eirik

2

Why did one of them blow ? XD

3

See pages 26 & 27 of ATmega328 datasheet.
Here's some tutorials:
http://www.ladyada.net/learn/avr/fuses.html

http://www.zembedded.com/avrf-fuse-bits/

4

URGE_with_carbos:
Hello!
I understand the fuse settings and their functions, but I have a really hard time understanding their location. When I search around all I can find is that they are in something like a fourth type of memory and such.
I would really appreciate a link, a picture 8) or directions in a datasheet.
Thanks in advance.
Eirik

Pictures!
http://www.break-ic.com/microprocessor-read/microcontroller_hack_technology2.htm

The fuses are shown in the 5th pix.

5

ha ha ha, what a funny guy Mr. B. XD

6

raschemmel:
ha ha ha, what a funny guy Mr. B. XD

Hey, when an Op asks for a pix, give 'em a pix.... Not like I sent a selfie

7

URGE_with_carbos:
I understand the fuse settings and their functions, but I have a really hard time understanding their location.

They're in the chip next to the RAM (or was it the EEPROM...?)

8

Is anybody going to tell them he doesn't need to know where they are , only how to change them ? (I would explain that but I can't the hex value table in the datasheet) . Maybe we should show him the boards.txt file ?

9

they are in something like a fourth type of memory

That's pretty much exactly correct. the procedure used to read and write them from within a program (on processors that allow that) is very similar to the procedure to read flash...
Here's a set of pictures of an arduino-compatible AVR chip claiming to label the config fuses. I don't know if I'm convinced, but the general idea is sound: http://blog.ioactive.com/2008_01_01_archive.html

10

Thank you for the funny answers :grin:

As I said, I know how to handle them and what they are for. I just wanted to know where they are. In the Flash, EEPROM,a register or in a sticker on the box.
And thank you for the pictures, they look exactly like I imagined.(hehe)