The TM4C1231E6PMI: That FPU matters if you are doing real-time PID, sensor fusion, or any math that would otherwise eat CPU cycles in software — the divide and multiply are single-cycle, so the loop rate stays predictable.
22-channel 12-bit ADC and CAN bus — analog and industrial interface
A 22-channel 12-bit ADC is a lot of analog inputs for a 64-pin package — you can monitor multiple sensor channels without an external mux.
Package and footprint — 64-LQFP
The TM4C1231E6PMI comes in a 64-LQFP package with a 10x10 mm body (EIAJ standard). The 43 I/O pins are accessible on 0.5 mm pitch. Surface-mount only; no exposed thermal pad on this package variant, so thermal dissipation goes through the leads.