(This is fairly off-topic on avr-libc-dev, so I'm redirecting it to
avr-chat.)

As David Carr wrote:

> I'm using the Mega16 in an application where I want to do in circuit
> programming.  At least to me, the datasheet is unclear about whether
> or not an external (passive) crystal connected to XTAL1 and XTAL2 is
> sufficent to provide a clock while programming.  Will the crystal
> work for programming or do I need something else?

Yes, sure, it will work.  Back in the days when AVRs didn't come with
a preconfigured internal RC oscillator, supplying external clock
(either directly or through a crystal) was the only option to get them
running, including with ISP.

-- 
cheers, J"org               .-.-.   --... ...--   -.. .  DL8DTL

http://www.sax.de/~joerg/                        NIC: JW11-RIPE
Never trust an operating system you don't have sources for. ;-)



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