Ultra-low-power Arm Cortex-M0+ MCU with 32 Kbytes of Flash memory, 32 MHz CPU, USB
Ultra-low-power Arm Cortex-M0+ MCU with 192-Kbytes of Flash memory, 32 MHz CPU, USB, AES

Ultra-low-power Arm Cortex-M0+ MCU with 16-Kbytes of Flash memory, 32 MHz CPU
Ultra-low-power Arm Cortex-M0+ MCU with 128-Kbytes of Flash memory, 32 MHz CPU, USB, LCD

Ultra-low-power Arm Cortex-M0+ MCU with 192-Kbytes of Flash memory, 32 MHz CPU, USB, AES