LM3S5737 Datasheet, PDF (678/833 Pages) Texas Instruments – Stellaris® LM3S5737 Microcontroller

Universal Serial Bus (USB) Controller
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
Bit/Field
7
6
Name
ISOUP
SOFTCONN
Type
R/W
R/W
Reset
0
0
Description
Isochronous Update
Value Description
1 The USB controller waits for an SOF token from the time the
TXRDY bit is set in the USBTXCSRLn register before sending
the packet. If an IN token is received before an SOF token, then
a zero-length data packet is sent.
0 No effect.
Note: This bit is only valid for isochronous transfers.
Soft Connect/Disconnect
Value Description
1 The USB D+/D- lines are enabled.
0 The USB D+/D- lines are tri-stated.
5:4
reserved
RO
0x2
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.
3
RESET
RO
0
RESET Signaling
Value Description
1 RESET signaling is present on the bus.
0 RESET signaling is not present on the bus.
2
RESUME
R/W
0
RESUME Signaling
Value Description
1 Enables RESUME signaling when the Device is in SUSPEND
mode.
0 Ends RESUME signaling on the bus.
This bit must be cleared by software 10 ms (a maximum of 15 ms) after
being set.
678
November 17, 2011
Texas Instruments-Production Data