Ultra-low-power Arm Cortex-M0+ MCU with 128-Kbytes of Flash memory, 32 MHz CPU
Ultra-low-power Arm Cortex-M0+ MCU with 128-Kbytes of Flash memory, 32 MHz CPU
Ultra-low power Arm Cortex-M0+ MCU with 64-Kbyte of Flash memory, 32 MHz CPU, USB

Ultra-low-power Arm Cortex-M0+ MCU with 64-Kbytes of Flash memory, 32 MHz CPU
Ultra-low-power Arm Cortex-M0+ MCU with 128-Kbytes of Flash memory, 32 MHz CPU
Ultra-low-power Arm Cortex-M0+ MCU with 64 Kbytes of Flash memory, 32 MHz, USB, LCD, AES