Atmel Xplained Evaluation Board AT32UC3A3-XPLD AT32UC3A3-XPLD Ficha De Dados
Códigos do produto
AT32UC3A3-XPLD
652
32072H–AVR32–10/2012
AT32UC3A3
27.7.3
USB Host Operation
27.7.3.1
Description of pipes
For the USBB in host mode, the term “pipe” is used instead of “endpoint” (used in device mode).
A host pipe corresponds to a device endpoint, as described by the
A host pipe corresponds to a device endpoint, as described by the
from the USB specification.
Figure 27-21. USB Communication Flow
In host mode, the USBB associates a pipe to a device endpoint, considering the device configu-
ration descriptors.
ration descriptors.
27.7.3.2
Power-On and reset
describes the USBB host mode main states.
Figure 27-22. Host Mode States
After a hardware reset, the USBB host mode is in the Reset state.
When the USBB is enabled (USBE is one) in host mode (ID is zero), its host mode state goes to
the Idle state. In this state, the controller waits for device connection with minimal power con-
the Idle state. In this state, the controller waits for device connection with minimal power con-
Ready
Idle
Device
Disconnection
<any
other
state>
state>
Device
Connection
Macro off
Clock stopped
Device
Disconnection
Suspend
SOFE = 1
SOFE = 0