11223344D DC CB BA AC1106C2104C4104VCC+3V3C3106VCC+5VY112MC522C622R2472LED1PWRGND1TXD2RXD3V34UD+5UD-6XI7XO8CTS#9DSR#10RI#11DCD#12DTR#13RTS#14R23215VCC16U1CH340GCH340G_VCCCH340G_3V3GNDVCC+5VVCC+5VR3472LED2TXDCH340G_VCCR4472LED3RXDCH340G_VCCCH340G_TXDCH340G_RXDCH340G_RXDCH340G_TXDGNDVCC+5VVCC+3V31234J2USBCH340G_VCCCH340G_TXDCH340G_RXDGNDCH340G_3V3123456J1CON6R1221VD13V3CH340G_VCC:模块供电点VCC+5V：从USB取出来的5V电源VCC+3V3：模块稳压出来的3V3电源（3.0V3.6V）（短路VCC+5V到CH340G_VCC：CH340G供电为5V，TTL电平为5V）（短路VCC+3V3到CH340G_VCC：CH340G供电为3V3，TTL电平为3V3）CH340G_TXD：串行数据输出CH340G_RXD：串行数据输入GND：模块接地（与目标系统地相连）
