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MSP430I2041: TIDM-SERVER-PWR-MON (tidu454a) : Rosc pin vs accuracy

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Part Number:MSP430I2041

TI,

How do we obtain such a low level of %error when using internal Rosc mode for DCO?  

tidu454a, page 13, schematic shows 'Rosc' floating?  For internal resistor DCO mode, it should be tied to AVSS.  For external mode, there should be an external resistor to AVSS.

I duplicated the schematic but added an accurate, external resistor but they did not get the same accuracy of < 1% error?

Regards,

Marc


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