SAM3A4C Atmel Corporation, SAM3A4C Datasheet - Page 1109

• Manufacturer Part Number: SAM3A4C
• Manufacturer: Atmel Corporation

39.6.1.2
Name:
Address:
Access:
• CLKUSABLE: UTMI Clock Usable
This bit is set when the UTMI 30 MHz is usable.
This bit is cleared when the UTMI 30 MHz is not usable.
• SPEED: Speed Status
This field is set according to the controller speed mode. This field shall only be used in device mode.
• VBUS: VBus Level
This bit is set when the VBus line level is high, even if UOTGHS_CTRL.USBE is zero.
This bit is cleared when the VBus line level is low, even if UOTGHS_CTRL.USBE is zero.
This bit can be used in device mode to monitor the USB bus connection state of the application.
• ID: UOTGID Pin State
This bit is cleared when the UOTGID level is low, even if UOTGHS_CTRL.USBE is zero.
This bit is set when the UOTGID level is high, event if UOTGHS_CTRL.USBE is zero.
• VBUSRQ: VBus Request
This bit is set when the UOTGHS_SFR.VBUSRQS bit is written to one.
This bit is cleared when the UOTGHS_SCR.VBUSRQC bit is written to one or when a VBus error occurs and
UOTGHS_CTRL.VBUSHWC is zero.
0: The UOTGVBOF output pin is driven low to disable the VBUS power supply generation.
1: The UOTGVBOF output pin is driven high to enable the VBUS power supply generation.
This bit shall only be used in host mode.
11057A–ATARM–17-Feb-12
11057A–ATARM–17-Feb-12
STOI
31
23
15
Value
–
–
–
7
0
2
1
3
General Status Register
UOTGHS_SR
0x400AC804
Read-only
CLKUSABLE
HNPERRI
Name
HIGH_SPEED
FULL_SPEED
LOW_SPEED
30
22
14
–
–
6
ROLEEXI
29
21
13
–
–
5
Description
Full-Speed mode
Low-Speed mode
High-Speed mode
Reserved
SPEED
BCERRI
28
20
12
–
–
4
VBERRI
VBUS
27
19
11
–
–
3
SRPI
26
18
10
ID
–
–
2
VBUSRQ
VBUSTI
25
17
–
–
9
1
SAM3X/A
SAM3X/A
IDTI
24
16
–
–
8
–
0
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