Hi-Speed USB 2.0 to 10/100/1000 Ethernet Controller
Datasheet
Host & Chipset Powered Off
VBUS_DET Set To 0 By EC
Or Via Circuitry
EC Sets PME_MODE_SEL = 1 And
Asserts PME_CLEAR
Deassert PME_CEAR
LAN7500/LAN7500i Has EEPROM
With GPIO PME Enable =1, Enters
PME Mode
False
Wakeup Event Detected
By LAN7500/LAN7500i?
True
LAN7500/LAN7500i Asserts PME
EC Detects PME
Yes
EC To Wake System To
Process Wakeup Event?
No
EC Signals Enable To Host
EC Asserts PME_CLEAR
VBUS_DET Set to 1 By EC
Or Via Circuitry
LAN7500/LAN7500i Resets And
Deasserts PME
EC Sets PME_MODE_SEL = 0 And
Asserts PME_CLEAR
LAN7500/LAN7500i Resets And
Deasserts PME
LAN7500/LAN7500i Connects To USB
Bus
LAN7500/LAN7500i Is In Normal
Operation
Figure 4.2 PME Operation
SMSC LAN7500/LAN7500i
Revision 1.0 (11-01-10)
DATA3S3HEET
SMSC [ SMSC CORPORATION ]
