LM3S9B81 Datasheet, PDF (916/1155 Pages) Texas Instruments – Stellaris® LM3S9B81 Microcontroller

Universal Serial Bus (USB) Controller
Bit/Field
2
1
0
Name
HOST
HOSTREQ
SESSION
Type
RO
R/W
R/W
Reset
0
0
0
Description
Host Mode
Value Description
0 The USB controller is acting as a Device.
1 The USB controller is acting as a Host.
Note: This value is only valid while a session is in progress.
Host Request
Value Description
0 No effect.
1 Initiates the Host Negotiation when SUSPEND mode is entered.
This bit is cleared when Host Negotiation is completed.
Session Start/End
When operating as an OTG A device:
Value Description
0 When cleared by software, this bit ends a session.
1 When set by software, this bit starts a session.
When operating as an OTG B device:
Value Description
0 The USB controller has ended a session. When the USB
controller is in SUSPEND mode, this bit may be cleared by
software to perform a software disconnect.
1 The USB controller has started a session. When set by software,
the Session Request Protocol is initiated.
Note: Clearing this bit when the USB controller is not suspended
results in undefined behavior.
916
June 29, 2010
Texas Instruments-Advance Information