Table 6-6 lists the GPIO muxed pins. The default mode for each GPIO pin is the GPIO function, except GPIO35 and GPIO37, which default to TDI and TDO, respectively. Secondary functions can be selected by setting both the GPyGMUXn.GPIOz and GPyMUXn.GPIOz register bits. The GPyGMUXn register should be configured before the GPyMUXn to avoid transient pulses on GPIOs from alternate mux selections. Columns that are not shown and blank cells are reserved GPIO Mux settings. GPIO ALT functions cannot be configured with the GPyMUXn and GPyGMUXn registers. These are special functions that need to be configured from the module.
GPIO20, GPIO21, GPIO36 and GPIO38 do not exist on this device. GPIO61 to GPIO63 exist but are not pinned out on any packages. Boot ROM enables pullups on GPIO61 to GPIO63. For more details, see Section 6.5.