GD32F103RET6

ARM® Cortex®-M3 32-bit MCU, Max Speed (MHz): 108; Memory (Bytes) Flash: 512K; Memory (Bytes) SRAM: 64K; I/O: up to 51; Timer GPTM (16bit): 4; Timer Advanced TM (16bit): 2; Timer Basic TM (16bit): 2; Timer SysTick (24bit): 1; Timer WDG: 2; Timer RTC: 1; Connectivity I2C: 2; Connectivity SPI: 3; Connectivity USB 2 FS: 1; Connectivity I2S: 2; Analog Interface 12bit ADC Units (CHs): 3(16); Analog Interface 12bit DAC Units: 2; Package: LQFP64