KSZ8842-16MBL-EVAL MICREL [Micrel Semiconductor], KSZ8842-16MBL-EVAL Datasheet - Page 4

• Manufacturer Part Number: KSZ8842-16MBL-EVAL
• Description: 2-Port Ethernet Switch with Non-PCI Interface
• Manufacturer: MICREL [Micrel Semiconductor]

Content
Pin Configuration for KSZ8842-16 Switches (8/16-Bit) ...................................................................................... 11
Ball Configuration for KSZ8842-16 Switches (8/16-Bit) ..................................................................................... 12
Pin Description for KSZ8842-16 Switches (8/16-Bit) .......................................................................................... 13
Ball Description for KSZ8842-16 Switches (8/16-Bit) ......................................................................................... 18
Pin Configuration for KSZ8842-32 Switches (32-Bit).......................................................................................... 22
Pin Description for KSZ8842-32 Switches (32-Bit) ............................................................................................. 23
Functional Description .......................................................................................................................................... 28
Functional Overview: Physical Layer Transceiver ............................................................................................. 28
Functional Overview: MAC and Switch ............................................................................................................... 32
Bus Interface Unit (BIU)......................................................................................................................................... 36
Queue Management Unit (QMU) ........................................................................................................................... 41
Advanced Switch Functions ................................................................................................................................. 44
Micrel, Inc.
October 2007
100BASE-TX Transmit ..........................................................................................................................................................28
100BASE-TX Receive ...........................................................................................................................................................28
Scrambler/De-scrambler (100BASE-TX only)........................................................................................................................28
10BASE-T Transmit...............................................................................................................................................................28
10BASE-T Receive................................................................................................................................................................28
Power Management...............................................................................................................................................................29
MDI/MDI-X Auto Crossover ...................................................................................................................................................29
Auto Negotiation ....................................................................................................................................................................30
LinkMD Cable Diagnostics.....................................................................................................................................................31
Address Lookup.....................................................................................................................................................................32
Learning.................................................................................................................................................................................32
Migration................................................................................................................................................................................32
Aging .....................................................................................................................................................................................32
Forwarding.............................................................................................................................................................................33
Switching Engine ...................................................................................................................................................................35
MAC Operation......................................................................................................................................................................35
Inter Packet Gap (IPG) ..........................................................................................................................................................35
Back-Off Algorithm.................................................................................................................................................................35
Late Collision .........................................................................................................................................................................35
Legal Packet Size..................................................................................................................................................................35
Flow Control ..........................................................................................................................................................................35
Half-Duplex Backpressure .....................................................................................................................................................35
Broadcast Storm Protection...................................................................................................................................................36
Repeater Mode......................................................................................................................................................................36
Clock Generator ....................................................................................................................................................................36
Asynchronous Interface .........................................................................................................................................................38
Synchronous Interface...........................................................................................................................................................39
Summary ...............................................................................................................................................................................39
BIU Implementation Principles...............................................................................................................................................41
Transmit Queue (TXQ) Frame Format...................................................................................................................................41
Receive Queue (RXQ) Frame Format ...................................................................................................................................42
Spanning Tree Support..........................................................................................................................................................44
IGMP Support........................................................................................................................................................................45
Straight Cable ...................................................................................................................................................................29
Crossover Cable ...............................................................................................................................................................30
Access ..............................................................................................................................................................................31
Usage ...............................................................................................................................................................................32
“IGMP” Snooping ..............................................................................................................................................................45
4
KSZ8842-16/32 MQL/MVL/MVLI/MBL
M9999-102207-1.9