KS8995MA
Micrel, Inc.
M9999-051305
4
May 2005
Table of Contents
System Level Applications ......................................................................................................................................... 7
Pin Description by Number ........................................................................................................................................ 9
Pin Description by Name .......................................................................................................................................... 15
Pin Configuration ...................................................................................................................................................... 21
Introduction
........................................................................................................................................................... 22
Functional Overview: Physical Layer Transceiver ............................................................................................... 22
100BASE-TX Transmit ........................................................................................................................................ 22
100BASE-TX Receive ......................................................................................................................................... 22
PLL Clock Synthesizer ......................................................................................................................................... 22
Scrambler/De-scrambler (100BASE-TX only) ..................................................................................................... 22
100BASE-FX Operation ....................................................................................................................................... 22
100BASE-FX Signal Detection ............................................................................................................................ 22
100BASE-FX Far End Fault ................................................................................................................................ 23
10BASE-T Transmit ............................................................................................................................................. 23
10BASE-T Receive .............................................................................................................................................. 23
Power Management ............................................................................................................................................. 23
MDI/MDI-X Auto Crossover ................................................................................................................................. 23
Auto-Negotiation .................................................................................................................................................. 23
Functional Overview: Switch Core ......................................................................................................................... 24
Address Look-Up ................................................................................................................................................. 24
Learning
........................................................................................................................................................... 24
Migration
........................................................................................................................................................... 24
Aging
........................................................................................................................................................... 24
Forwarding ........................................................................................................................................................... 24
Switching Engine ................................................................................................................................................. 24
MAC Operation .................................................................................................................................................... 24
Inter-Packet Gap (IPG) ................................................................................................................................ 24
Backoff Algorithm ......................................................................................................................................... 24
Late Collision ................................................................................................................................................ 26
Illegal Frames .............................................................................................................................................. 26
Flow Control ................................................................................................................................................. 26
Half-Duplex Back Pressure .......................................................................................................................... 26
Broadcast Storm Protection ......................................................................................................................... 26
MII Interface Operation ........................................................................................................................................ 26
SNI Interface Operation ....................................................................................................................................... 28
Advanced Functionality ............................................................................................................................................ 28
Spanning Tree Support ........................................................................................................................................ 28
Special Tagging Mode ......................................................................................................................................... 29
IGMP Support ...................................................................................................................................................... 30
Port Mirroring Support ......................................................................................................................................... 31
VLAN Support ...................................................................................................................................................... 31
Rate Limit Support ............................................................................................................................................... 32
Configuration Interface ........................................................................................................................................ 33
I2C Master Serial Bus Configuration ............................................................................................................ 35
SPI Slave Serial Bus Configuration ............................................................................................................. 35
MII Management Interface (MIIM) ....................................................................................................................... 38