30 MHz Cortex-M0+ in a 16-TSSOP — what it fits
The NXP LPC812M101JDH16J is a 32-bit ARM Cortex-M0+ single-core MCU running at 30 MHz, with 16 KB Flash and 4 KB RAM. The 16-TSSOP package (4.40 mm width) keeps board footprint small — suited for space-constrained sensor nodes, simple motor control, or I²C/SPI/UART bridge applications. The internal oscillator saves an external clock crystal, reducing BOM count.
Memory and I/O budget
16 KB Flash and 4 KB RAM set the firmware ceiling. That is enough for a Modbus RTU slave, a basic PID loop with a few setpoints, or a serial-to-I²C protocol converter. The 14 I/O lines, combined with brown-out detect, POR, PWM, and WDT peripherals, cover most standalone control tasks without external glue logic.