GD32F407VGT6 ARM® Cortex®-M4 32-bit MCU, Max Speed (MHz): 168; Memory (Bytes) Flash: 1024K; Memory (Bytes) SRAM: 192K; I/O: up to 82; Timer GPTM (32bit): 2; Timer GPTM (16bit): 8; Timer Advanced TM (16bit): 2; Timer Basic TM (16bit): 2; Timer WDG: 2; Timer RTC: 1; Connectivity I2C: 3; Connectivity SPI: 3; Connectivity USB 2 FS: FS+HS; Connectivity I2S: 2; Analog Interface 12bit ADC Units (CHs): 3(16); Analog Interface 12bit DAC Units: 2; Package: LQFP100