One CDC function requires 2 IN / 1 OUT endpoints (interrupt IN/ bulk IN/ bulk OUT), other than the default EP.
Available endpoints of each STM32F family are,
STM32F102/103 - FS Device core: 7 IN / 7 OUT
STM32F105/107 - OTG_FS: 3 IN / 3 OUT
STM32F2xx/4xx - OTG_FS: 3 IN / 3 OUT
STM32F2xx/4xx - OTG_HS: 5 IN / 5 OUT
STM32F102/103 - 3x CDC composite [ 6 IN - 3 OUT ]
STM32F105/107 - just one CDC [ 2 IN - 1 OUT ]
STM32F2xx/4xx - 2x CDC composite on OTG_HS [ 4 IN - 2 OUT ]
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Available endpoints of each STM32F family are,
STM32F102/103 - FS Device core: 7 IN / 7 OUT
STM32F105/107 - OTG_FS: 3 IN / 3 OUT
STM32F2xx/4xx - OTG_FS: 3 IN / 3 OUT
STM32F2xx/4xx - OTG_HS: 5 IN / 5 OUT
STM32F102/103 - 3x CDC composite [ 6 IN - 3 OUT ]
STM32F105/107 - just one CDC [ 2 IN - 1 OUT ]
STM32F2xx/4xx - 2x CDC composite on OTG_HS [ 4 IN - 2 OUT ]
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