LAN8710A Datasheet, PDF (7/82 Pages) SMSC Corporation – Small Footprint MII/RMII 10/100 Ethernet Transceiver with HP Auto-MDIX and flexPWR Technology

Small Footprint MII/RMII 10/100 Ethernet Transceiver with HP Auto-MDIX and flexPWR^® Technology
Datasheet
Chapter 1 Introduction
1.1
1.2
General Terms and Conventions
The following is list of the general terms used throughout this document:
BYTE
FIFO
MAC
MII
RMII^TM
N/A
X
RESERVED
SMI
8-bits
First In First Out buffer; often used for elasticity buffer
Media Access Controller
Media Independent Interface
Reduced Media Independent Interface^TM
Not Applicable
Indicates that a logic state is “don’t care” or undefined.
Refers to a reserved bit field or address. Unless otherwise
noted, reserved bits must always be zero for write
operations. Unless otherwise noted, values are not
guaranteed when reading reserved bits. Unless otherwise
noted, do not read or write to reserved addresses.
Serial Management Interface
General Description
The LAN8710A/LAN8710Ai is a low-power 10BASE-T/100BASE-TX physical layer (PHY) transceiver
with variable I/O voltage that is compliant with the IEEE 802.3-2005 standards.
The LAN8710A/LAN8710Ai supports communication with an Ethernet MAC via a standard MII (IEEE
802.3u)/RMII interface. It contains a full-duplex 10-BASE-T/100BASE-TX transceiver and supports
10Mbps (10BASE-T) and 100Mbps (100BASE-TX) operation. The LAN8710A/LAN8710Ai implements
auto-negotiation to automatically determine the best possible speed and duplex mode of operation. HP
Auto-MDIX support allows the use of direct connect or cross-over LAN cables.
The LAN8710A/LAN8710Ai supports both IEEE 802.3-2005 compliant and vendor-specific register
functions. However, no register access is required for operation. The initial configuration may be
selected via the configuration pins as described in Section 3.7, "Configuration Straps," on page 36.
Register-selectable configuration options may be used to further define the functionality of the
transceiver.
Per IEEE 802.3-2005 standards, all digital interface pins are tolerant to 3.6V. The device can be
configured to operate on a single 3.3V supply utilizing an integrated 3.3V to 1.2V linear regulator. The
linear regulator may be optionally disabled, allowing usage of a high efficiency external regulator for
lower system power dissipation.
The LAN8710A/LAN8710Ai is available in both extended commercial and industrial temperature range
versions. A typical system application is shown in Figure 1.1.
SMSC LAN8710A/LAN8710Ai
7
DATASHEET
Revision 1.4 (08-23-12)