Fuse bits - Atmel AVR

[Robert]

Hi,
I have LPT (ISP AVR) programmer, (
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&category=50915&item=7523475186&rd=1&ssPageName=WDVW
)
what happens when the programmer disconnect from PCB (with ATmega8)
during programming time. (programming with fuse bits) ?
Can I destroy my Atmega ?

 

[Dave Garnett]

Hi,
I have LPT (ISP AVR) programmer, (
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&category=50915&item=7523475186&rd=1&ssPageName=WDVW
)
what happens when the programmer disconnect from PCB (with ATmega8)
during programming time. (programming with fuse bits) ?
Can I destroy my Atmega ?

I have had a case where the SPIEN fuse got set somehow by disconnecting
during programming. This means that the ATmega8 can only be (re)programmed
in Parallel (High Voltage) mode. If you don't have such a programmer to
hand, it is probably simpler and cheaper to throw the chip away ...

Dave