Datasheet

V850ES/JG3-H, V850ES/JH3-H CHAPTER 21 USB FUNCTION CONTROLLER (USBF)
R01UH0042EJ0500 Rev.5.00 Page 1180 of 1513
Aug 12, 2011
Figure 21-13. Flowchart of Program When Power Is Supplied
Masks INTUSBF0 and
INTUSBF1 interrupts
Starts USBF clock supply
START
Enables USB bus, disables
measures against floating
END
Checks status of pin
interrupt detecting host
connection status
Initializes register area,
enables measures
against floating
Unmasks USB-related
interrupts and discards
interrupts
Automatic device setup
by Plug&Play
Yes
Host connected?
No