Re: Programming ATMega8515

Rich Webb wrote:
> 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.
> 
Thanks.
On all ATMega8515 the signatures read 0x1E 0x93 0x01 with a warning that 
the signature doesn't match the selected device. On ATMega8515L nothing 
is readable, neither signature or fuses.
The clock is set for 28k
Firmware version is  0x020a