16 MHz CPU, 64 KB FRAM — the non-volatile memory that wears like RAM
Its program memory is 64 KB of FRAM — ferroelectric RAM that combines the read/write speed of SRAM with the non-volatility of Flash, rated for 10^15 write cycles. That makes it a fit for data-logging applications where the MCU writes to its own code space frequently, or for over-the-air firmware updates where the erase-before-write penalty of Flash would stall the system. The 2K x 8 SRAM handles the stack and scratchpad for moderate-sized buffers.
51 I/O, I²C and SPI on the same die
The integrated 8-channel 12-bit ADC (A/D 8x12b) covers analog sensor inputs directly. Internal oscillator means no external crystal is needed for the core clock, though one can be added for precision timing.
Industrial temperature range and exposed-pad package
Surface-mount only, MSL 3 handling — bake before reflow if the moisture barrier bag has been open past the floor-life window.
TI lists the MSP430FR58721IRGCR as Active (current production). The base product number MSP430FR58721 covers a family of density and peripheral variants; if a design later needs more memory or a different peripheral mix, a pin-compatible sibling within the same FRAM series is the natural migration path.