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will printf() conflict with the 232 serial communcation in embedded linux system?

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http://www.linuxquestions.org – I'm having an embedded linux device. I'm using ttyO2 as my console. However, at the same time my MCU need to perform RS232 communicate with a device through ttyO2. Now lets say if the MCU and the device are communicating, and I type some characters in the console terminal, or there runs another thread that will invoke function printf() , will that conflicts with the 232 communication? is the printf() outputting to the ttyO2? thanks (HowTos)