LAN9730 Datasheet, PDF (105/222 Pages) SMSC Corporation – High-Speed Inter-Chip (HSIC) USB 2.0

LAN9730/LAN9730i
4.12 Wake Events
The following events can wake up/enable the device, depending on the power state.
• USB host Resume
• Wake On LAN (Wakeup Frame, Magic Packet, Perfect Destination Address Frame, and Broadcast Frame)
• Reception of a Good Frame - a frame received when no Wake On LAN events are enabled in the Wakeup Control
and Status Register (WUCSR) that meets the filtering requirements configured in the MAC Control Register
(MAC_CR).
• PHY Energy Detect
• PHY Link Up
• GPIO[10:0]
Table 4-63 illustrates the wake events permitted in each of the power states.
TABLE 4-63: POWER STATE/WAKE EVENT MAPPING
Power State
SUSPEND0
SUSPEND1
SUSPEND2
SUSPEND3
USB Host
Resume
Signaling
YES
YES
YES
YES
WOL
YES
NO
NO
NO
Good
Frame
NO
NO
NO
YES
PHY
Energy
Detect
NO
YES
NO
NO
PHY
Link Up
YES
NO
NO
YES
GPIO[10:0]
YES
YES
YES
YES
The occurrence of a GPIO wake event causes the corresponding bit in the Interrupt Status Register (INT_STS) to be
set. Before suspending the device, the host must ensure that any pending wake events are cleared. Otherwise, the
device will immediately be awakened after being suspended.
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DS00001946A-page 105