1 KB Flash — what it means for firmware fit
The 1 KB Flash program memory sets a firm ceiling on code size. That is enough for a single control loop with a few state machines, a UART communication handler, and basic PWM generation — but not for a full protocol stack or a multi-threaded application. If your firmware is already compiled and fits, this part is a clean match; if you are still estimating, budget tightly. The 256 bytes of RAM (organized as 256 x 8) similarly limits data buffering and stack depth.
