Fuse Bytes Configuration

[hardeep]

 

I am using external 12Mhz crystal…please help to to configure the Fuse bits…

 

I had programmed the fuse bits as 

CLKSEL3..0 = 1000

 

SUT0…1 = 01

 

The controller is getting locked…

Plz Help me…!!!

[Amit Joshi]

 you are using high freq. range external crystal so CLKSEL3..0 will be 1111 and it is better to configure the controller at 16k ck+ 64 ms start-up time so SUT will be 11.

 so overall fuse byte will be  higher byte=0xFF,  lower byte = 0x89

 

If u want to disable the JTAG, the fuse byte will be  higher byte=0xFF,  lower byte = 0xC9.

 

In try these configurations. if u asre not able to program the controller the SPIEN might be disabled. this bit enable/disables the serial programing of the controller. to enable it parallel programmer is needed. 

[dagakshay]

refer here for the details of fuse bits configuration:

http://www.engineersgarage.com/tutorials/avr-atmega16-fuse-bits

[hardeep]

Thanks a lot…!!! It helped me…

[Author]

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