16 MHz CPU, 2 KB flash — sizing the firmware envelope
The MSP430G2201IPW14: The MSP430 CPU16 core runs at 16 MHz — the throughput ceiling for this 16-bit RISC architecture. With 2 KB of on-chip flash and 128 bytes of RAM, the firmware budget is tight: this suits a single-purpose state machine or a sensor readout loop, not a multitasking stack. The 10 I/O pins handle a few digital inputs, a PWM output, and a serial link.
14-TSSOP package and on-chip peripherals
Housed in a 14-TSSOP (4.40 mm width) with surface-mount termination — the 0.65 mm pitch is routable on a two-layer board for simple control applications.