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: 1854
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: 1379
i am using stk200/300 programmer for programming my atmega8 avr(my software is bascom 220.127.116.11)
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: 1112
Hi, i make project PC thermometer, I use atmega8, senzor LM35CZ, MAX 233..., I can`t find code in C for USART, can somebody help me? I know now if I must use internal oscilator or external krystal. PLease help...
Microcontrollers :: 02.03.2009 04:18 :: newman696 :: Replies: 15 :: Views: 27834
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: 1333
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: 5025
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: 1700
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: 477
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: 2224
No. If you read the datasheet, you'll see that the maximum frequency it is guaranteed to work properly is 16MHz. As alexan_e has said, ATMEGA48/88/168 can work upto 20MHz.
Hope this helps.
Microcontrollers :: 26.09.2011 12:53 :: Tahmid :: Replies: 5 :: Views: 508
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: 1397
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: 469
what atmega89c51 can do in a circuit ? Why its used ?
Electronic Elementary Questions :: 25.10.2012 06:58 :: dineshdeshmuk :: Replies: 7 :: Views: 314
I use this ptrogrammer:
I wrote an atmega8 without problems. When i change the fuse bits for an ext. RC Osc. 12 mhz (ckse0,1,2, ckopt, sut0 it's correct!), after i have connected the RC.osc 12 mhz with capacitors, but if i want reprogrammed the micro ponyprog not re
Microcontrollers :: 14.12.2012 12:43 :: orsa99 :: Replies: 19 :: Views: 366
Hi all, I;m new in AVR. I've just built one ADD parallel port programmer to program AVR, software is ispprog.
(1)I connect the MOSI, MISO, SCK, RST, GND, VCC pin to atmega8535. i was able to program it.
(2) I connect MOSI, MISO,SCK,RST,GND,VCC pin to Attiny2313. I cant program it. Only after i add in a crystal to the Xtal1 and Xtal2 pin of Att
Microcontrollers :: 06.01.2007 12:20 :: wakaka :: Replies: 9 :: Views: 5059
please let me know how should i set the CKSEL fusebits to work with external 16M
crystal in atmega8-16pu ?
Microcontrollers :: 08.11.2007 01:12 :: omid_juve :: Replies: 2 :: Views: 900
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: 2414
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: 772
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: 479
i am trying to burn bootloader on atmega8l with arduinoISP. I connected 17,18,19 of atmega8 (mosi, miso, sck) with 11,12,13 pin of arduino. reset pin of atmega8 to pin 10 of arduino. a 10uf cap between reset and ground. No external crystal, as i was using internal crystal oscillator. (...)
Microcontrollers :: 14.05.2013 16:27 :: debojitk :: Replies: 5 :: Views: 696
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: 1646