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: 954
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: 992
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: 2440
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: 9564
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: 3553
can you please tell me the part no. of avr. Is it atmega8 or 8L. If you connect a 4 or 8 mhz external crystal could solve your problem. There are two version of mega8 avr, the difference is maximum frequency supported by them. Or try JTAG parallel port programmer in case you have disabled the spi by mistake.
Kindly refer the datasheet.
Microcontrollers :: 12-31-2009 02:25 :: attrish :: Replies: 3 :: Views: 1804
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: 34286
you read the data sheet about clock in sheet atmega8
Microcontrollers :: 11-08-2007 08:18 :: ElecThai :: Replies: 2 :: Views: 1365
I think it might be the problem due to capacitors, choose the accurate value of capacitor. See whether your chip is atmega8 or atmega8l and have capacity to drive to that much frequency
Microcontrollers :: 11-08-2007 06:21 :: yogi :: Replies: 7 :: Views: 1638