Re: Programming ATMega8515

On Tue, 15 Apr 2008 15:43:34 -0400, russ lyttle <lyttlec@[EMAIL PROTECTED]
>
wrote:

>I'm trying to program ATMega8515's using STK500 and have not had any 
>luck. I've programmed ATMega16's and AT90S8515 OK with 3 Stk500 boards, 
>but get device ID errors with ATMega8515's. I've also looked on the 
>Atmel site, but haven't found the right FM to read.

The "usual" problem with programming AVRs is that they typically
(all?) come from the factory set to use the internal RC oscillator as
the clock source and that oscillator is typically (always?) set, or
divided down, to 1 MHz.

If the STK500's programming clock is higher than 1/4 of that then
programming will fail. Check the "settings" button under the Main tab
from the STK500 window in AVR Studio.

A good test is to *always* do a signature check before trying to
program. If the signature is wrong or cannot be read then something's
amiss.

Once you're talking to it reliably, set the fuses as needed if you're
using an external clock source or crystal.

-- 
Rich Webb     Norfolk, VA