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Section 20 USB Function Module
Rev. 4.00 Sep. 14, 2005 Page 765 of 982
REJ09B0023-0400
20.3.23 USB Bus Power Control Register (USBCTRL)
This LSI can operate using a bus power control method. For details of the bus power control
method, see section 20.9, USB Bus Power Control Method.
USBCTRL can be initialized to H'00 by a power-on reset.
Bit Bit Name
Initial
Value R/W Description
7 to 2 All 0 R Reserved
The write value should always be 0.
1 SUSPEND 0 R/W USB Suspend Enable
Allows an interrupt by the USB suspend signal or
awake signal detection.
0 PWMD 0 R/W Power Mode
Changes how the power is supplied.
0: Self-powered
1: Bus-powered