16-bit MSP430 core with 4 KB Flash — what fits in that memory budget
It runs at 16 MHz and carries 4 KB of Flash program memory with 256 bytes of RAM — a configuration sized for single-function control loops, sensor readout, and simple communication tasks where code fits under 4 KB and the stack doesn't need more than 256 bytes. The 16 general-purpose I/O pins, plus I²C, SPI, and UART serial interfaces, cover basic peripheral integration without an external bridge chip.
256-byte RAM — planning the data buffer
The 256 x 8 RAM is the tightest resource on this part. A UART receive buffer, a few sensor readings, and the call stack can fill it quickly. For designs that log data or handle multi-byte packets, the firmware needs to move samples to Flash promptly or use a circular buffer smaller than 128 bytes.
The base product number MSP430G2303 covers the whole density variant family, so if a future design needs more memory, a pin-compatible upgrade within the same package is possible without a board spin.
20-TSSOP footprint and tape-and-reel delivery
Store the reels dry: TSSOP packages are MSL-rated, and the reel should stay in the moisture-barrier bag until the reflow oven is ready.