16-bit MSP430 core with 2 KB Flash — what the memory budget means
The 256 x 8 RAM is the hard limit for stack depth and interrupt nesting; a design with multiple ISRs or a moderate data buffer will need to budget carefully. Peripherals include a brown-out detect and reset (BOR), power-on reset (POR), watchdog timer (WDT), and a DMA controller — the DMA can move data between peripherals and memory without CPU intervention, which helps stretch the small RAM. The USI module supports I²C and SPI in software-configurable mode, giving two serial buses on a single hardware block.
20-pin DIP — breadboard and low-volume assembly
The 20-PDIP supplier package code matches the industry-standard footprint. Sixteen of the twenty pins are general-purpose I/O.
Industrial temperature grade and active lifecycle
It is not rated for the extended automotive range (125°C junction), so avoid under-hood or engine-bay deployment without qualification testing.