FRAM memory — what it changes for the BOM
The 32 KB FRAM replaces both Flash and EEPROM in a single memory block. Unlike Flash, FRAM writes at bus speed with no erase cycle, so the MCU can log sensor data or update calibration constants without wearing out the memory. For designs that currently split a Flash MCU plus an external serial EEPROM, this part consolidates the BOM — no separate EEPROM, no page-write delays. The 4K x 8 RAM handles stack and variable storage; the FRAM handles persistent data and code equally.
Connectivity and peripheral set
On-chip I²C, SPI, UART/USART, and IrDA cover the common serial buses for sensor bridges, external ADCs, and display modules. The internal oscillator eliminates an external crystal for many applications, though a crystal can still be added for precision timing. Brown-out detect and POR are built in — no external supervisor IC needed for basic reset handling. PWM outputs support simple motor or LED drive without a dedicated timer peripheral.