KS8993
Micrel
Table of Contents
System Level Applications ..............................................................................................................................................................
5
Pin Description
I/O Grouping
.............................................................................................................................................................................. 6
.............................................................................................................................................................................. 9
I/O Descriptions
............................................................................................................................................................................ 10
Pin Configuration ...........................................................................................................................................................................
15
Functional Overview: Physical Layer Transceiver .....................................................................................................................
16
100BaseTX Transmit ............................................................................................................................................................... 16
100BaseTX Receive ................................................................................................................................................................ 16
PLL Clock Synthesizer ............................................................................................................................................................ 16
Scrambler/De-scrambler (100BaseTX only) ............................................................................................................................ 16
100BaseFX operation .............................................................................................................................................................. 16
100BaseFX Signal Detection ................................................................................................................................................... 16
100BaseFX Far End Fault ....................................................................................................................................................... 16
10BaseT Transmit ................................................................................................................................................................... 16
10BaseT Receive .................................................................................................................................................................... 16
Power Management ................................................................................................................................................................ 17
LED Mode Selection ................................................................................................................................................................ 17
Auto-Negotiation ...................................................................................................................................................................... 17
Functional Overview: Switch Core ...............................................................................................................................................
18
Address Look Up ..................................................................................................................................................................... 18
Learning .......................................................................................................................................................................... 18
Migration ......................................................................................................................................................................... 18
Aging
............................................................................................................................................................................ 18
Forwarding ...................................................................................................................................................................... 18
Switching Engine ..................................................................................................................................................................... 18
MAC (Media Access Controller) Operation ............................................................................................................................. 18
Inter Packet Group .......................................................................................................................................................... 18
Back off Algorithm ........................................................................................................................................................... 18
Late Collision .................................................................................................................................................................. 18
Illegal Frame ................................................................................................................................................................... 18
Flow Control .................................................................................................................................................................... 18
Full-Duplex Flow Control ................................................................................................................................................. 18
Half-Duplex Back Pressure ............................................................................................................................................. 18
VLAN Support .......................................................................................................................................................................... 19
QoS Priority Support ................................................................................................................................................................ 20
MII Interface Operation ..................................................................................................................................................................
21
SNI Interface (7-wire) Operation ...................................................................................................................................................
22
Absolute Maximum Ratings ..........................................................................................................................................................
23
Operating Ratings ..........................................................................................................................................................................
23
Electrical Characteristics ..............................................................................................................................................................
23
Timing Diagrams ............................................................................................................................................................................
24
Reference Circuit ...........................................................................................................................................................................
29
4B/5B Coding
MLT Coding
............................................................................................................................................................................ 31
............................................................................................................................................................................ 32
802.1q VLAN and 802.1p Priority Frame ......................................................................................................................................
33
Selection of Isolation Transformers .............................................................................................................................................
34
Selection of Reference Crystals ...................................................................................................................................................
34
Package Outline and Dimensions ................................................................................................................................................
35
KS8993
4
April 2009
MICREL [ MICREL SEMICONDUCTOR ]
