1 KB Flash and 256 B RAM — sizing the firmware footprint
The MSP430G2113IPW28R is a 16-bit MSP430 CPU16 microcontroller from TI's MSP430G2xx series, built for ultra-low-power sensing and control tasks. That memory budget is the hard constraint: the part will fit a small interrupt-driven state machine or a periodic sensor read-and-transmit loop, but not a full protocol stack or data-logging buffer. The 24 available I/O lines give enough headroom for a keypad matrix, LED indicators, and a serial link.
The 28-TSSOP package is a fine-pitch surface-mount footprint that suits automated assembly; the 0.65 mm pitch means a standard PCB fab can handle it without micro-via processes.
That means TI is still manufacturing this part, there is no last-time-buy notice, and it remains qualified for new designs. The base product number MSP430G2113 shares the same die across package variants, so if the 28-TSSOP footprint ever becomes an issue, other package options exist within the same family.