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MSP430F2274: How to hook up External Vref?

Part Number: MSP430F2274


Hi all,

If I wanted to hook up the an External VREF to the MSP430F2274, do I just need to hook up the VREF+ pin to the external VREF or do I also need to hook VREF- to Ground?

 

It seems like I only need to hook up the External VREF to the VREF+ pin and that the “ground” can be set to use the AVSS pin by setting SREFx to “010”. 

I would appreciate any confirmation on this since the datasheet does not it make it clear. 

Thank you.

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