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MCBSTM32E User's Guide
Introduction Setup 
Theory of Operation 
Block Diagram Schematics Technical Data Prototyping Area Microcontroller External Memory Power Supply Configuration JTAG Interface ETM Interface LCD Panel LEDs Push Buttons Joystick Potentiometer Speaker Serial Port CAN Interface USB Interface MicroSD Connector Writing Programs Example Programs STM32F10x Software LibrarySerial Port
The MCBSTM32E board connects the on-chip serial UART to the ST3232 (IC7), which converts the logic signals to RS-232 voltage levels.
The serial port (COM) is configured as a standard 5-wire interface. The DB9 connector is wired directly to the ST3232 serial UART. Refer to the figure below for details.
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