32-Bit ARM Cortex-M0+ MCU, 32MHz, 192KB Flash, 20KB RAM, USB, 32-Pin QFN
Ultra-low-power Arm Cortex-M0+ MCU with 128-Kbytes of Flash memory, 32 MHz CPU, USB
32-bit ARM Cortex-M0+ MCU, 192KB Flash, 32MHz, 50 I/O, 64-pin PBGA

Ultra-low-power Arm Cortex-M0+ MCU with 128-Kbytes of Flash memory, 32 MHz CPU