I'd like to shift and use the bias voltage from 1/2AVDD.
Is the pull up --pulldown of the bias voltage possible?
May I know what is your application and why do you need to pullup or pulldown the Vbias? The bias circuitry is designed for capacitive loads (eg thermocouples). It sets the common mode voltage of the selected input channel to (AVDD − AVSS)/2.
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