32-bit MCU, 50MHz, 256KB Flash, 64KB RAM, TQFP, 34 I/O
32-bit MCU, 50MHz, 256KB Flash, 64KB RAM, 34 I/O, I2C, SPI, USB, UART, SM
32-bit 50MHz MCU, 256KB Flash, 64KB RAM, QFN, 34 I/O