Small Footprint MII/RMII 10/100 Ethernet Transceiver for Automotive Applications
Datasheet
Chapter 3 Functional Description
This chapter provides functional descriptions of the various device features. These features have been
categorized into the following sections:
Transceiver
Auto-Negotiation
HP Auto-MDIX Support
MAC Interface
Serial Management Interface (SMI)
Interrupt Management
Configuration Straps
Miscellaneous Functions
Application Diagrams
3.1
Transceiver
3.1.1
100BASE-TX Transmit
The 100BASE-TX transmit data path is shown below. Each major block is explained in the following
subsections.
TX_CLK
(for MII only)
PLL
MAC
Ext Ref_CLK (for RMII only)
MII 25 MHz by 4 bits
4B/5B
Encoder
Scrambler
and PISO
25 MHz
by 4 bits
25 MHz
by 5 bits
or
MII/RMII
RMII 50 MHz by 2 bits
NRZI
Converter
MLT-3
Converter
Tx
Driver
125 Mbps Serial
NRZI
MLT-3
MLT-3
MLT-3
MLT-3
Magnetics
RJ45
CAT-5
SMSC LAN88710AM/LAN88710BM
19
Revision 1.1 (05-26-10)
DATASHEET
SMSC [ SMSC CORPORATION ]
