... , system bus, data bus access AHB multi-layer matrix with 8-channel DMA controller, general-purpose (GPDMA) support the SSP, UART, AD ... display interface (which can take 2.8-inch or 3.2-inch color TFT 320X240)8, USB2.0 Interface, USB host and ... user keys, 2 function keys and the INT0 Reset button, 8 LED lights13,1 Five keys to enter the joystick (Joystick ...