ADS1299: SRB and BIAS functionality in EEG

Part Number: ADS1299

Tool/software:

Hello,

I am facing some problems understanding the funcionality of the SRB1, SRB2 and BIAS functionality. 

The purpose of the project is to read eeg data from the 8 Inputs.

It is possible to stablish the INxN inputs to the SRB reference? I would like to connect my electrodes only to the INxP inputs. If so, how should I modify the registers?

On the other hand, as I understand, BIAS is intended for giving a reference signal to reduce signal noise. But after reading the datasheet I still dont know how to configure it and connect it.

Any help?

Thanks!!