9 Threads found on edaboard.com: atmega8 External Crystal
I am using at atmega8 with a 12 MHz external crystal oscillator.
The fuses were programmed as follows:
LFUSE 0xEF 1110 1111
HFUSE 0xC9 1100 1001
I was starting to set up a very basic timer application and I noticed that I was getting an unexpected frequency with the timer counter. (exactly half the expected frequency)
Microcontrollers :: 06-25-2012 11:32 :: cgchas :: Replies: 0 :: Views: 711
Hi , I have an atmega8 with its clock fuses unknown !!
I want to program it but I dont know what type of oscillator to use
is there anyway to restore the fuses to original state (1 Mhz internal oscillator)???
I have a USBasp programmer only .
Microcontrollers :: 06-21-2012 14:55 :: anonymous. :: Replies: 2 :: Views: 776
The external crystal oscillator can be enabled with setting fuse bit in atmega8
BE CAREFUL WHILE CHANGING FUSEBITS
Best of luck
Microcontrollers :: 01-21-2011 06:59 :: nandhu015 :: Replies: 3 :: Views: 2097
How to recover wrong fuses settings on a AVR say atmega8 ? may be isp disabled (cannot detect chip error-24).don't suggest HV programmer method pls suggest any easier way to recover .
i am using pony prog2000.thanks.
Microcontrollers :: 10-01-2010 06:14 :: santoshaxl :: Replies: 8 :: Views: 7018
i use atmega8
, and y program to send "Hallo" to USART(Tx), and when i look in hyperterminal i see other character. i serch on the net and the character is from extended ascii code.
i dont understand why it happen this.
Please can you give me a hand.
This is the cod i am useing it:
Microcontrollers :: 05-22-2010 11:58 :: calin17us :: Replies: 5 :: Views: 3091
I tried a simple program in the atmega8 board for flashing LED. Initially , when I programmed, the internal clock of 1MHz was used. The LED was flashing.
Then I changed to 2MHz,4MHz and 8MHz. The speed at which LED blinking was fast.
Then I wanted to try with external crystal. But the crystal I used was 12MHz (I (...)
Microcontrollers :: 12-31-2009 00:07 :: sivakumar_tumma :: Replies: 3 :: Views: 1530
Hi, i need help. I use external crystal 7,3728 MHz for comunnication USART (atmega8) and for connection i need 2xcondenzator 22pF. Is it correct?
My calculation when i use crystal: 7.3728 MHz, 9600 baud rate gives UBRR = 47 and no error. its allright? If not, please help.
// USART initialization
// Communication Par
Microcontrollers :: 03-04-2009 23:11 :: senthilkumar :: Replies: 15 :: Views: 30971
you read the data sheet about clock in sheet atmega8
Microcontrollers :: 11-08-2007 08:18 :: ElecThai :: Replies: 2 :: Views: 1120
i am using stk200/300 programmer for programming my atmega8 avr(my software is bascom 126.96.36.199)
in one of my program i used the internal 8M oscillator and i don`t have
any problem with it but in another program i need external 16M crystal to
work. so i defined the CKSEL t0 1111 and write the fusebit on the avr and then i placed
Microcontrollers :: 11-06-2007 05:19 :: omid_juve :: Replies: 7 :: Views: 1388