> the way I read the datasheet, the 628A internal oscillator should
> ALWAYS be stable enough for serial comm.  Not so?

F13 (jitter) : 2%

This is on the edge.

Note: the 1% is only for Vdd=3.5 and 25 C, whith no margin for both
conditions, so is useless.

Also note: the initial accuracy is not specified. I am not sure this is
included in the 2%.

Wouter van Ooijen

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