2 KB Flash, 128 B RAM — design for a lean firmware footprint
With 2 KB of Flash and 128 bytes of RAM, this part is not for a feature-rich application. The code space fits a single control loop, a few register configurations, and a small lookup table. The 128-byte RAM handles a handful of global variables and a shallow call stack — no room for buffered data logging or a real-time OS. The Flash is field-reprogrammable via JTAG or Spy-Bi-Wire, so firmware tweaks during prototype validation or production rework are possible without swapping mask ROM parts.