M10 Hardware DesignIO CONNECTORTXDRXDGNDPWRKEYMODULE(DCE)Serial portTXDRXDGNDPWRKEYFigure 18 : Connection of software upgradeNote: The RTS PIN must be connected to the GND in the customer circuit when only the TXDand RXD are used in the Serial Port communication.CUSTOMER(DTE)TXDRXDGNDMODULE(DCE)Debug portDBG_TXDDBG_RXDGNDFigure 19 : Connection of software debugThe serial port and the debug port don’t support the RS_232 level and it only supports the CMOSlevel. You should add the level converter IC between the DCE and DTE. If you connect it to thecomputer, Please refer to the following figure.M10_HD_V1.00 - 37 -Quectel
