KS8842-32MQL Micrel Inc, KS8842-32MQL Datasheet - Page 4

• Manufacturer Part Number: KS8842-32MQL
• Description: IC SWITCH 10/100 32BIT 128PQFP
• Manufacturer: Micrel Inc

Specifications of KS8842-32MQL

• Applications: *
• Mounting Type: Surface Mount
• Package / Case: 128-MQFP, 128-PQFP
• Number Of Primary Switch Ports: 2
• Internal Memory Buffer Size: 32
• Operating Supply Voltage (typ): 3.3V
• Fiber Support: Yes
• Integrated Led Drivers: Yes
• Phy/transceiver Interface: MII
• Power Supply Type: Analog/Digital
• Package Type: PQFP
• Data Rate (typ): 10/100Mbps
• Vlan Support: Yes
• Operating Temperature (max): 70C
• Operating Temperature (min): 0C
• Pin Count: 128
• Mounting: Surface Mount
• Jtag Support: No
• Operating Supply Voltage (max): 3.5V
• Operating Supply Voltage (min): 3.1V
• Operating Temperature Classification: Commercial
• Data Rate: 100Mbps
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: KS8842-PMQL-EVAL - EVAL KIT EXPERIMENTAL KS8842KS8842-16MQL-EVAL - EVAL KIT EXPERIMENTAL KS8842
• Lead Free Status / RoHS Status: Not Compliant, Lead free / RoHS Compliant
• Other names: 576-1459

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