AVR-Chat

No ?I haven't played with any fuses I read some horror stories :)

From my research it said this chip had an internal oscillator so I didn't need a crystal on my target board?


-Kenny

----- Original Message -----
From: "Marc R.J. Brevoort" <mrjb@dnd.utwente.nl>
To: AVR-Chat@yahoogroups.com
Sent: Tuesday, January 19, 2010 10:39:53 AM GMT -05:00 US/Canada Eastern
Subject: Re: [AVR-Chat] AVRISP -> AtTiny Communication Problem

On Sun, 17 Jan 2010, Kenny M. wrote: 

> Power up chip, power up isp, avr studio reads 5V on circuit. 
> But the same error when reading... 

Have you set any fuses to use the external crystal? 
If so, you'll need a crystal hooked up when 
programming the ATtiny (or feed it with an external 
oscillator). 

Best, 
Marc

On Tue, 19 Jan 2010, Kenny M. wrote:

> No I haven't played with any fuses I read some horror stories :)
> From my research it said this chip had an internal oscillator so
> I didn't need a crystal on my target board?

If set to use the internal oscillator, it will work without
crystal. You can often get away with using the internal
oscillator, however, the it is more sensitive to fluctuating
temperatures/input voltages than an external crystal.

Best,
Marc