64 KB FRAM — no more wear-leveling worry
The MSP430FR5869IRGZR: That makes it a fit for applications that log data continuously or field-update firmware without wearing out the memory array. The 2 KB of SRAM handles stack and scratchpad for real-time control loops.
16 MHz CPU, 12-bit ADC, 40 I/O — what the peripherals mean for a sensor node
The core runs at 16 MHz — enough for sensor polling, PID loops, and protocol handling without burning through a battery. The 40 GPIOs leave headroom for a keypad, LEDs, and external memory chip selects.
The thermal pad needs a via array to the ground plane for heat sinking — skip the vias and the junction temperature climbs faster under continuous load. The exposed pad also serves as the primary ground return for the core and I/O ring.
TI lists the MSP430FR5869IRGZR as Active.