32-bit ARM Cortex-M3 MCU, 128KB Flash, 32MHz, UFQFPN
32-bit ARM Cortex-M3 MCU, 128KB Flash, 32MHz, UFQFPN, USB, I2C, SPI
32-bit ARM Cortex-M3 MCU, 128KB Flash, 32MHz, 48-Pin QFN