It runs at 8 MHz and carries 4 KB of Flash program memory with 256 x 8 bytes of RAM — enough for small control loops, sensor readout, and simple communication stacks in battery-operated or low-power embedded systems.
On-chip peripherals include a power-on reset (POR) and watchdog timer (WDT), plus a slope A/D converter for low-resolution analog measurements without an external ADC. The 14 general-purpose I/O lines are available in the 20-TSSOP package, which occupies a compact 4.40 mm width footprint on the board.
This means Texas Instruments has flagged it for eventual discontinuation; new design-ins should target a current-production MSP430 derivative.