4 KB Flash and 256-byte RAM — sizing the firmware budget
The MSP430G2302IRSA16R: The 4 KB Flash (4K x 8) is the hard ceiling for application code and constant data. That is enough for a small state machine, a few sensor reads, and a communication protocol handler, but it rules out a full RTOS or a TCP/IP stack. The 256 x 8 RAM handles a modest call stack and a handful of variables — watch the linker map if you are adding interrupt service routines with deep nesting. For a firmware engineer, the internal oscillator and brown-out reset (BOR) reduce external component count, but the 16 MHz PLL requires setting flash wait states correctly at speed or the first branch out of reset hard-faults.