引脚编号GPIO完全独立连接关系说明34PA0WK_UPY1,按键KEY_UP2,可以做待机唤醒脚(WKUP)35PA1N接LAN8720的REFCLKO脚36PA2USART2_TX/RS485_RXETH_MDION1,RS232串口2(COM2)RX脚(P9设置)2,RS485 RX脚(P9设置)3,LAN8720的MDIO脚37PA3USART2_RX/RS485_TXPWM_DACN1,RS232串口2(COM2)TX脚(P9设置)2,RS485 TX脚(P9设置)3,PWM_DAC输出脚40PA4STM_DACDCMI_HREFY1,DAC_OUT1输出脚2,OLED/CAMERA接口的HREF引脚41PA5STM_ADCYADC输入引脚,同时做TPAD检测脚42PA6DCMI_PCLKYOLED/CAMERA接口的PCLK脚43PA7N接LAN8720的CRS_DV脚100PA8DCMI_XCLK REMOTE_INN1,OLED/CAMERA接口的XCLK脚2,接HS0038红外接收头101PA9USART1_TXY串口1 TX脚,默认连接CH340的RX(P6设置)102PA10 USART1_RXY串口1 RX脚,默认连接CH340的TX(P6设置)103PA11USB_D-CAN_RXY1,USB D-引脚(P11设置)2,CAN_RX引脚(P11设置)104PA12USB_D+CAN_TXY1,USB D+引脚(P11设置)2,CAN_TX引脚(P11设置)105PA13JTMSSWDIONJTAG/SWD仿真接口,没接任何外设109PA14JTCKSWDCLKNJTAG/SWD仿真接口,没接任何外设110PA15JTDIUSB_PWRN1,JTAG仿真口(JTDI)2,USB_HOST接口供电控制脚46PB0T_SCKYTFTLCD接口触摸屏SCK