Load the bootloader using AVRStudio

Forum 2005-2010 (read only) Hardware Troubleshooting
1

I want to load the bootloader using AVRStudio. I have read this tutorial (at the botton), but I have an answer.

All ATMEL micro controller, by default, have actived the internal clock, and if you want to use an external one you must choose it with the fuses.

In the tutorial does not appears nothing about this, how can I do this???

Thanks!!!

2

do you have a ISP programmer like the avr mk2 ?.

3

I have an AVR-Dragon.

4

Can anyone help me??? Thanks

5

Which ATmega are you burning? The fuses are different for the Mega8, Mega168, and Mega328.

6

How I do it is via isp, using the avr mk2

And set the fuse brown out voltage , and set it for 8mhz extranal xtal.
If you get it wrong you can just re change the settings after.
But it all depends on what xtal mhz , chip etc.

7

I want to burn a Mega168.

If you get it wrong you can just re change the settings after.

I have this problem some time ago...I ask in avrfreaks and all answers were that I only can reset this fuse using a Higth Voltage programmer.

8

No , I think if you have a isp programmer , I dont think you can brick it. Ive installed the bootloader on 3 168 chips so far and loaded a hex file direct to the chip so cutting of the need of the boot loader, which frees up 2 extra k

9

I want to burn a Mega168

Here are the relevant fuses, as shown in AVRStudio:

No , I think if you have a isp programmer , I don`t think you can brick it.

Nope, with just an ISP programmer, you can 'brick' an ATmega. The easiest way is choosing an impossible oscillator setting or disabling SPI. (Notice above how AVRStudio can't alter this value in ISP mode.)

I ask in avrfreaks and all answers were that I only can reset this fuse using a Higth Voltage programmer.

Conveniently, the AVR-Dragon IS a high voltage programmer.