FRAM memory — what it changes for the firmware strategy
The FRAM array serves both program storage and data logging without a separate EEPROM. Writes are at bus-cycle speed and low-energy, allowing logging on every power cycle without wear.
Peripherals and I/O — what is on the pins
Thirty I/O lines are available in the 38-TSSOP package. On-chip peripherals include a brown-out reset, power-on reset, PWM timer, and watchdog timer — enough for a standalone controller without external supervisor ICs. The 14-channel 10-bit ADC samples at rates suitable for slow analog signals (temperature, pressure, battery voltage). Serial connectivity covers I²C, SPI, UART, LIN, and IrDA, so the part can bridge to a Modbus RTU transceiver, an LCD driver, or a wireless module.