Page 685 of the Tiva TM4C123GH6PM Microcontroller DATA SHEET shows bitfield [3:0] as R/W for GPIOAMSEL.
It's unclear to me how the field should be set, especially for PB4, PB5, PE4 and PE5.
For example, what value would one set at 0x4000.5528 to enable the analog function of the pin at PB5/AIN11? I would think it should be 0x20, but bit 5 of GPIOAMSEL is documented as Read Only / Reserved.
