https://www.nxp.com/products/KL0x?tab=Buy_Parametric_Tab
Arm Cortex-M0+|Ultra-Low Power Kinetis KL0x MCUs | NXP Semiconductors
Reliable 32-bit microcontrollers from NXP Kinetis KL0x series deliver ultra-low-power performance with flash memory options from 8 KB to 32 KB
arm cortexlow powerultra