LM3S3748 Datasheet, PDF (519/753 Pages) List of Unclassifed Manufacturers – Microcontroller

LM3S3748 Microcontroller
Register 2: USB Power (USBPOWER), offset 0x001
Host
USBPOWER is an 8-bit register that is used for controlling Suspend and Resume signaling, and
some basic operational aspects of the USB controller.
Device
USBPOWER Host Mode
USB Power (USBPOWER)
Base 0x4005.0000
Offset 0x001
Type R/W, reset 0x20
7
6
5
4
reserved
Type RO
RO
RO
RO
Reset
0
0
1
0
3
2
1
0
RESET RESUME SUSPEND PWRDNPHY
R/W
R/W R/W1S R/W
0
0
0
0
Bit/Field
7:4
3
2
1
0
Name
reserved
RESET
RESUME
SUSPEND
PWRDNPHY
Type
RO
R/W
R/W
R/W1S
R/W
Reset
0x02
0
0
0
0
Description
Software should not rely on the value of a reserved bit. To provide
compatibility with future products, the value of a reserved bit should be
preserved across a read-modify-write operation.
Reset
This bit is set to enable Reset signaling on the bus and cleared to end
Reset signaling on the bus.
Resume Signaling
Set by the CPU to generate Resume signaling when the device is in
Suspend mode. The CPU should clear this bit after 20 ms.
Suspend Mode
This bit is written to 1 by the CPU to enter Suspend mode. Writing a 0
does nothing.
Power Down PHY
Set by the CPU to power down the internal USB PHY.
USBPOWER Device Mode
USB Power (USBPOWER)
Base 0x4005.0000
Offset 0x001
Type R/W, reset 0x20
7
6
5
4
ISOUP SOFTCONN
reserved
Type R/W
R/W
RO
RO
Reset
0
0
1
0
3
2
1
0
RESET RESUME SUSPEND PWRDNPHY
RO
R/W
RO
R/W
0
0
0
0
April 08, 2008
519
Preliminary