®
MII/RMII 10/100 Ethernet Transceiver with HP Auto-MDIX and flexPWR Technology in a Small Footprint
Datasheet
10/100
Ethernet
MAC
MDI
Transformer
RJ45
LAN8710
Ethernet
Transceiver
MII or
RMII
MODE
LED Status
Crystal or
Clock Osc
Figure 1.1 LAN8710/LAN8710i System Block Diagram
1.3
Architectural Overview
The LAN8710/LAN8710i is compliant with IEEE 802.3-2005 standards (MII Pins tolerant to 3.6V) and
supports both IEEE 802.3-2005 compliant and vendor-specific register functions. It contains a full-
duplex 10-BASE-T/100BASE-TX transceiver and supports 10-Mbps (10BASE-T) operation, and 100-
Mbps (100BASE-TX) operation. The LAN8710/LAN8710i can be configured to operate on a single 3.3V
supply utilizing an integrated 3.3V to 1.2V linear regulator. An option is available to disable the linear
regulator to optimize system designs that have a 1.2V power supply available. This allows for the use
of a high efficiency external regulator for lower system power dissipation.
1.3.1
Configuration
The LAN8710 will begin normal operation following reset, and no register access is required. The initial
configuration may be selected with configuration pins as described in Section 5.3.9. In addition,
register-selectable configuration options may be used to further define the functionality of the
transceiver. For example, the device can be set to 10BASE-T only. The LAN8710 supports both IEEE
802.3-2005 compliant and vendor-specific register functions.
Revision 1.0 (04-15-09)
SMSC LAN8710/LAN8710i
DATA1S0HEET
SMSC [ SMSC CORPORATION ]
