RS485-RS232通讯切换电路--原理图(含保护)

11223344DDCCBBAATitleNumberRevisionSizeA4Date:2015/3/26SheetofFile:D:\RS485_RS232通讯切换电路--原理图（含保护）.SchDocDrawnBy:RS485和RS232通讯相互切换通讯方式配置接口VDD3V3VDD1GDD1GDD1GDD1GDD1VDD1VDD1VDD1GDD1RXDUTXDU485RXRS485_BRS485_AEARTHEARTHCOM_ACOM_BCOM_A'COM_B'TXDRXDUART_RXDUART_TXDVDD1GDD1TXDUVDD1GDD1GDD1485RXRXDUCOM_A'RS485_AUART_TXDCOM_B'RS485_BUART_RXD与非2345U5SN74AHC1G04DBVA1B235Y4U2SN74AHC1G08T2IN10R1OUT12R2OUT9T1OUT14T2OUT7R2IN8V+2C1+1C1-3C2+4C2-5V-6VCC16GND15R1IN13T1IN11U1SP232EQ1FDGQ2FDGQ3FDGR210R/1WR410R/1WR5510RR1510RR3120ROUTA2INB3GND25OUTB6Vcc2+8INA7Vcc1+1GND14U3ISO7221RE2TE3GND5A6VCC8B7RX1TD4U4SN65LBC1841234J3123J1123J4RS485信号入口UART信号入口红线为UART信号接入蓝色虚线为RS485信号接入TVS1SA18CAC10.1uFC20.1uFC60.1uFC80.1uFC70.1uFC90.1uFC50.1uFC40.1uFC100.1uFGDD1GDD1GDD1C30.1uF123456J2VDD1GDD1RS485和RS232通讯相互切换电路雨花石--制作