Comments on: Programming AVR fuse bits – oscillator settings

By: kartik kapadia

kartik kapadia — Tue, 07 Feb 2012 10:50:29 +0000

I intend to use adc and usart part of atmega32. I have already programmed the same without changing any fuse bits and it works perfectly fine so i suppose its using internal 1Mhz clock, but using this i am able to get only 4800 baud maximum and i want to have 9600 baud. So i need to use internal 4Mhz clock atleast. Please suggest me necessary changes i need to make in code and elsewhere. I am using avrstudio for coding and usb programmer for programming. I have interfaced lm35 through adc and it is working so will changing the clock speed affect that? Please reply as soon as possible. Thanking you

By: S ud

S ud — Thu, 02 Feb 2012 06:48:38 +0000

When i m running atmega8 for long time on timer its hanging using inernal oscillator, does using external crystal will help do i use 12mhz or 8mhz?
n plz do reply its settings also

By: charan

charan — Sun, 20 Nov 2011 18:10:32 +0000

i want to use crystal of 16MHz in atmega controller can you tell me how
wil the fuse bit look like?
what does hfuse and lfuse mean?

By: fortron

fortron — Sun, 24 Jul 2011 18:02:07 +0000

Hi
I use Atiny2313 configurated for external clock source with no prescaler.
It work fine but XTAL2 pin cant bee used as I/O pin PA1 (is all time output with low level !).
I’m wrong ?
Data sheets is not precisely with this.
Please help !

By: U we

U we — Thu, 28 Apr 2011 09:27:09 +0000

Hello,
I hav Atmega 32 with external 16Mhz crystal oscl.Connected to PC via MAX232,DB9 conn. M using Hyperterminal 2 check the respond but uC not responding.
Have Programmed it using WinAVR.Have set the baudrate correctly,1Stop bit,Non parity,8bit data frame.
But still no response
Do i have to fiddle my fuse setting?If yes then which??
Help Appreciated.

By: Problem with AVR microcontroller programming

Problem with AVR microcontroller programming — Wed, 30 Mar 2011 16:54:44 +0000

[...] unprogrammed (1) and cksel programmed (0) in ponyprog unprogrammed in checked , take a look at Programming AVR fuse bits – oscillator settings – Scientific, embedded, biomedical, electronic… Yes, you have to use capacitors about 15-22p Alex Reply With Quote View [...]

By: ali

ali — Wed, 16 Mar 2011 19:07:35 +0000

Hi
programmer is stk200/300
fuse bites id for external low frequency crystal
but for program eeror =chip is damaged
plase help for crystal

By: Paul & Sabrina's cheap DIY 144v motor controller - Page 423 - Fuel Economy, Hypermiling, EcoModding News and Forum - EcoModder.com

Sun, 09 Jan 2011 16:10:50 +0000

[...] file. So you have to set them manually. Here is a page that I found that describes the process: Programming AVR fuse bits – oscillator settings – Scientific, embedded, biomedical, electronic… The key fuse for you, which Paul was describing, is to change the chips frequency from 1 Mhz to 16 [...]

By: Marcio Andrade

Marcio Andrade — Wed, 22 Dec 2010 23:59:23 +0000

Hi,
I’m a bit confused about change fuse bits in Ponyprog. I need program a ATmega 8 with HFUSE=0xc9 LFUSE=0xef.
May I change de fuse bits to follow the project instructions with the options in the window “confguration and security bits” of Ponyprog?

Thank you in advance.

By: mamun

mamun — Sat, 25 Sep 2010 19:51:26 +0000

I am using ATmega32 and write hex by using ponyprog.
please help me how to setting bit fuse configure for use 12MHz external crystal oscillator