What the 2 KB Flash and 128-byte RAM actually mean for your BOM line
This isn't a part you drop a full RTOS or TCP/IP stack onto; it's sized for a single control loop with a handful of state variables, a few sensor readings through the 8-channel 10-bit ADC, and a periodic I²C or SPI transaction to a companion chip. The 16 MHz core speed gives you enough headroom for 10 µs interrupt service routines if you keep the code lean.
On-chip peripherals that save board space
The MSP430G2231 integrates a brown-out detect and power-on reset, a PWM timer, a watchdog timer, I²C and SPI serial interfaces, and the 10-bit ADC — all on a single die in a 14-pin TSSOP package. For a simple sensor hub or a brushed-DC motor controller with current-sense feedback, this peripheral set eliminates the need for external glue logic or a separate ADC. The 10 general-purpose I/O pins handle a few pushbuttons, LEDs, and a serial debug header.