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atmega8 External Crystal

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9 Threads found on 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) Here (...)
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 .
The external crystal oscillator can be enabled with setting fuse bit in atmega8 BE CAREFUL WHILE CHANGING FUSEBITS Best of luck
hi experts 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.
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: #include #include #define F_
hi siva, 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.
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
you read the data sheet about clock in sheet atmega8
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 Bibin John

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