16-bit MSP430 with 8 MHz core — what the speed means for your loop
The MSP430F155IPMR: The 48 I/O lines in a 64-LQFP package give enough headroom for parallel displays or keypad matrices without an external port expander.
On-chip converters and brown-out supervision — BOM consolidation
The brown-out detect and POR blocks handle power-up sequencing and supply-drop resets internally, so you can skip an external supervisor IC. DMA offloads data transfers from the CPU, keeping the 8 MHz core free for control math rather than byte-shuffling.