During the developer days they had here, when talking about the new 5xx series - there will be an internal LF oscillator available as well (REFO) - although it is less accurate than a crystal (1% tolerance typical, 3.5% max) - not good enough for an accurate RTC, but accurate enough for many other uses (like a low speed baud rate generator).

----- Original Message -----
>From: "work_onair"
>To:
>Sent: Monday, July 21, 2008 12:44 AM
>Subject: [msp430] Re: Keeping accurate time
>> Looking thru the TI appnote on MSP and RTC - I found the following:
>> This seems to imply that the internal LF oscillator should provide an
>> accurate clock without needing an external source.
>> Is that true?
>> (Of source the example that follows - uses an external 32 KHz
>> oscillator - so I am a little confused)
>> Does this mean that if 12KHz is good enough - can I use it as the
>> clock source to keep accurate time??
>
>No, you need a crystal.
>
>Leon
>------------------------------------

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