The NXP MKL15Z32VLK4 is a 32-bit ARM Cortex-M0+ MCU from the Kinetis KL1 series, clocked at 48 MHz with 32 KB of Flash and 4 KB of RAM.
48 MHz Cortex-M0+ — enough for sensor fusion and basic control
The 48 MHz core polls I²C sensors and runs a PID loop without a scheduler. The 4 KB RAM is the real constraint — budget it for stack, a modest buffer, and one or two state machines.
Package and mounting — 80-LQFP, 12x12 mm body
The 80-LQFP package (12x12 mm) is a standard surface-mount footprint. Tray delivery. No special reflow profile required beyond what the datasheet specifies for LQFP.