21 Threads found on edaboard.com: atmega8 External Crystal
i want to see the atmega8 adc result on my pc i am using bascom avr
terminal emulator displaying the following code whatever i print
can any one help me
Microcontrollers :: 01.10.2007 05:05 :: zohaib :: Replies: 7 :: Views: 2022
I am in to strange problem could not understand yet. I have been working with ATMEL MCU atmega8 with many projects using UART, SPI, i had no problem, but now recently, i bought few atmega8 and using Internal Osc. 4Mhz but it is not working and ihave connected another device at SPI it is also not working. the MCU TX / RX not working. B
Microcontrollers :: 02.11.2007 19:36 :: sakaz :: Replies: 5 :: Views: 1484
i am using stk200/300 programmer for programming my atmega8 avr(my software is bascom 22.214.171.124)
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 :: 06.11.2007 05:19 :: omid_juve :: Replies: 7 :: Views: 1273
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 :: 04.03.2009 23:11 :: senthilkumar :: Replies: 15 :: Views: 30067
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 :: 31.12.2009 00:07 :: sivakumar_tumma :: Replies: 3 :: Views: 1445
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 :: 01.10.2010 06:14 :: santoshaxl :: Replies: 8 :: Views: 6224
The external crystal oscillator can be enabled with setting fuse bit in atmega8
BE CAREFUL WHILE CHANGING FUSEBITS
Best of luck
Microcontrollers :: 21.01.2011 06:59 :: nandhu015 :: Replies: 3 :: Views: 1938
I would like to know if someone had made this arrangement Satfinder Elektor March 2011 to find out what fuse box for the atmega8, I'm a little lost (even many) I visited the site [http : / / but I can not understand how to take control in the dropdown menu, I know the installation uses an
Microcontrollers :: 23.04.2011 09:02 :: jeanmichel63 :: Replies: 0 :: Views: 614
Just program my atmega8L on PonyProg with this
Now after WRITE button I can't read it anymore //:cry:
I think I had DISABLE the SPIEN pin? but the SPIEN is greyed...
Microcontrollers :: 30.06.2011 06:48 :: kasamiko :: Replies: 27 :: Views: 2702
i just want to know can atmega8 configured to external crystal for 20mhz or by setting external crytal will it perform well ?just want to know i am in doubt ?
Microcontrollers :: 26.09.2011 12:41 :: santoshaxl :: Replies: 5 :: Views: 609
I am new to avr's.. i want to program configuration and security bits for atmega8(external crystal 8 Mhz) and i want to reprogram its flash, so i don't want to lock it..
Here is image of settings which i used earlier to Program one of my atmega8, but now it is not working i cant read or write or even erase it : (...)
Microcontrollers :: 24.01.2012 10:46 :: tushki7 :: Replies: 6 :: Views: 1699
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 :: 25.06.2012 11:32 :: cgchas :: Replies: 0 :: Views: 599
I'm new to electronics and assembly programming. I've been struggling for the past 24 hours trying to get a simple LED to turn on (not even blink) on PB0 but seem to be doing something wrong.
First of all, my code:
The fuse configuration on my atmega8 is as follows
Electronic Elementary Questions :: 25.10.2012 04:42 :: avrnoob :: Replies: 7 :: Views: 440
I used in the first time an external crystal to 12 mhz and for the setting, i selected ext. RC Osc. 12 mhz . If i want to change the fusebits of the atmega8 for other use, the connection with the square generator is the only way?
There is no other way?
Now this is even more conf
Microcontrollers :: 15.12.2012 10:21 :: rohitkhanna :: Replies: 19 :: Views: 474
I'm not sure but as I remember, Attiny2313 has no internal clock.
if you set fuse bit of atmega8535 to work with crystal then you can not program it without any crystal.
Microcontrollers :: 07.01.2007 00:17 :: hr_rezaee :: Replies: 9 :: Views: 5211
you read the data sheet about clock in sheet atmega8
Microcontrollers :: 08.11.2007 08:18 :: ElecThai :: Replies: 2 :: Views: 1016
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 :: 22.05.2010 11:58 :: calin17us :: Replies: 5 :: Views: 2825
Good morning at all.
I want built this:
I need to change the fusebits of the atmega8.
1) first i flash with hex files and only AFTER i change the fusebits?
2) When i have changed the fusebits (ext. rc. osc. to 12 mhz) , i can not do it anymore (reprogrammed)?
3) the setting with
Microcontrollers :: 31.05.2012 11:57 :: orsa99 :: Replies: 6 :: Views: 975
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 :: 21.06.2012 14:55 :: anonymous. :: Replies: 2 :: Views: 647
Microcontrollers :: 14.05.2013 18:06 :: tpetar :: Replies: 5 :: Views: 1303
Here's is a Frequency Counter based on Atmel atmega8 AVR, with complete schematics and C source code.
Main page with several other MCU projects
Microcontrollers :: 27.09.2004 17:21 :: ME :: Replies: 5 :: Views: 1787