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Pin 32 is a functional pin that can be configured as a GPIO or as SPI Master Interface. If you look at Table 3 of the D2000 datasheet you’ll see that pin 32 is a GPIO that is powered with IOVDD/AVDD.
See more information on AVDD and IOVDD here:
You can also select one of the following functions for pin 32:
Function 0: GPIO 1
Function 1: AI1
Function 2: SPI_M_SS1
Pin 1 (AR) is also described in table 3. It is a pin that needs to be powered with AVDD. It’s a power source pin.