AVR-Chat

Hello,

Reviewing your original note ... you want to do serial communication and you
think you need a crystal oscillator to clock the mpu.

It seems to me that there is no reason that the internal oscillator and a
bit-bang serial comm solution won't work just fine. These type of routines
have been through here a number of times and I'm sure that there are a
number of examples around. The internal oscillator, at least in the Atmel
mpus that I've used, can be tweeked with OSCCAL to get pretty close, like 2%
or better. That should be quite sufficient to do serial communication.

That part, the ATtiny13 doesn't have too many pins and we don't know what
you want to do but you may want/need to use the pin for something else.

Jim

----- Original Message ----- 
From: Alexandre Guimaraes
To: AVR-Chat@yahoogroups.com
Sent: Monday, July 04, 2005 5:21 PM
Subject: [AVR-Chat] External oscillator for the Tiny13.


Hi,

    All this talk about crystals got me thinking about a cheap way to make a
external oscillator for the Tiny13.... The only thing bad about this part is
that it can not drive a crystal to make serial comms possible :-( Nothing
can be perfect....

    Does anyone have a handy, small and cheap crystal oscillator circuit
that is reliable and uses low power ??? If it could use a resonator even
better.... It gets cheaper and is good enough for serial communications...

Best regards,
Alexandre Guimaraes




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