LAN7500I-ABZJ SMSC, LAN7500I-ABZJ Datasheet - Page 34

• Manufacturer Part Number: LAN7500I-ABZJ
• Description: IC USB-10/100/1K ETH CTRL 56QFN
• Manufacturer: SMSC

Specifications of LAN7500I-ABZJ

• Design Resources: LAN7500I BOM LAN7500I Schematic
• Controller Type: Ethernet Controller, USB 2.0 to 10/100/1K
• Interface: USB/Serial
• Voltage - Supply: 1.2V, 2.5V, 3.3V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 56-VFQFN Exposed Pad
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Supply: -
• Other names: 638-1109

Revision 1.0 (11-01-10)
Chapter 5 NetDetach Operation
5.1
NetDetach
NetDetach is a mode of operation where the device detaches from the USB bus after the Ethernet
cable is disconnected. This is advantageous for mobile devices, as an attached USB device may
prevent the Host CPU from entering the ACPI C3 state. Allowing the CPU to enter the C3 state
maximizes battery life, as the C3 state is the lowest of the four APCI power states.
When detached, the device is in a low power state. After the Ethernet cable is reconnected, or a
programmed GPIO pin asserts, the device automatically attaches to the USB bus.
...ZZZ
LAN7500/
LAN7500i
SMSC
Ethernet
Figure 5.1 LAN7500/LAN7500i Detach
DATASHEET
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2
3
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Battery-powered Netbook PC
may enter C3 sleep mode
Remove Ethernet Cable
USB Electricals Detach
Hi-Speed USB 2.0 to 10/100/1000 Ethernet Controller
SMSC LAN7500/LAN7500i
Datasheet