CHAPTER 12 USB FUNCTION CONTROLLER (USBF)
Preliminary User’s Manual U19014EJ1V0UD
350
Figure 12-8. Flowchart of Program When Power Is Supplied
Masks INTUSBnB and
INTRSUM interrupts
Starts USBF clock supply
START
Enables USE 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
Remark
n = 0 to 2
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