Datasheet

673
32072H–AVR32–10/2012
AT32UC3A3
27.8.1 USB General Registers
27.8.1.1 General Control Register
Name: USBCON
Access Type: Read/Write
Offset: 0x0800
Reset Value: 0x03004000
• UIMOD: USBB Mode
This bit has no effect when UIDE is one (USB_ID input pin activated).
0: The module is in USB host mode.
1: The module is in USB device mode.
This bit can be written even if USBE is zero or FRZCLK is one. Disabling the USBB (by writing a zero to the USBE bit) does not
reset this bit.
• UIDE: USB_ID Pin Enable
0: The USB mode (device/host) is selected from the UIMOD bit.
1: The USB mode (device/host) is selected from the USB_ID input pin.
This bit can be written even if USBE is zero or FRZCLK is one. Disabling the USBB (by writing a zero to the USBE bit) does not
reset this bit.
• UNLOCK: Timer Access Unlock
1: The TIMPAGE and TIMVALUE fields are unlocked.
0: The TIMPAGE and TIMVALUE fields are locked.
The TIMPAGE and TIMVALUE fields can always be read, whatever the value of UNLOCK.
• TIMPAGE: Timer Page
This field contains the page value to access a special timer register.
• TIMVALUE: Timer Value
This field selects the timer value that is written to the special time register selected by TIMPAGE. See Section 27.7.1.8 for
details.
• USBE: USBB Enable
Writing a zero to this bit will reset the USBB, disable the USB transceiver and, disable the USBB clock inputs. Unless explicitly
stated, all registers then will become read-only and will be reset.
1: The USBB is enabled.
0: The USBB is disabled.
31 30 29 28 27 26 25 24
------UIMODUIDE
23 22 21 20 19 18 17 16
- UNLOCK TIMPAGE - - TIMVALUE
15 14 13 12 11 10 9 8
USBE FRZCLK VBUSPO OTGPADE VBUSHWC
76543210
STOE ROLEEXE BCERRE VBERRE VBUSTE IDTE