Datasheet

86
32142D–06/2013
ATUC64/128/256L3/4U
Figure 8-2. Speed Selection in device mode
8.6.1.5 Data management
Endpoints and pipe buffers can be allocated anywhere in the embedded memory (CPU RAM or
HSB RAM).
See ”RAM management” on page 90.
8.6.1.6 Pad Suspend
Figure 8-3 illustrates the behavior of the USB pad in device mode.
Figure 8-3. Pad Behavior
• In Idle state, the pad is in low power consumption mode.
• In Active state, the pad is working.
Figure 8-4 illustrates the pad events leading to a PAD state change.
R
PU
UDCON.DETACH
DP
DM
UDCON.LS
VBUS
Idle
Active
USBE = 1
& DETACH = 0
& Suspend
USBE = 0
| DETACH = 1
| Suspend