This is very confusing! In the User Guide, page 22, the figure shows that ADC pins are connected to the internal microcontroller which has 10-bit resolution. But in the Knowledge Base webpage here
it says that: “The secondary micro-controller on this XBee is connected to the ADC pins instead of the RF processor.”
Moreover, the ADC on the secondary micro-controller (MC9S08QE32 has 12-bit resolution.
Thanks for any help!