FRAM memory — why it changes the BOM calculus
FRAM is the standout feature here: it writes at bus speed with no erase-before-write penalty, draws negligible standby current, and retains data through power loss without a backup battery. That means you can log sensor data or store calibration constants directly in program space without wearing out sectors — no EEPROM emulation or external serial memory needed. The 10-channel 12-bit ADC and four 12-bit DAC channels handle analog front-end tasks on-chip, reducing external component count for closed-loop control or multi-sensor acquisition.
Connectivity and peripherals — what is on the bus
On-chip peripherals include a brown-out detect, POR, PWM outputs, and a watchdog timer — enough to build a standalone controller without external supervisor ICs.
TI lists the MSP430FR2355TDBT as Active. The base product number MSP430FR2355 indicates a family with multiple density and package variants, so if a future redesign needs more memory or a different footprint, there is a pin-compatible migration path within the same series without a PCB respin.