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STM32F4 USB resistor confusion

Question asked by zhao.frank on Oct 12, 2012
Latest reply on Mar 20, 2013 by
The datasheet of the STM32F405, appendix A.3 shows example application circuit for USB peripheral, it does not show any resistors.

But, the schematic for the STM32F4Discovery shows two 22 ohm resistors on the DP and DM signals, also it shows a EMIF02-USB03F2, which serves the same purpose.

These are terminating resistors, are they required for the STM32F405?