KS8842-16MQL Micrel Inc, KS8842-16MQL Datasheet - Page 4
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KS8842-16MQL
Manufacturer Part Number
KS8842-16MQL
Description
IC SWITCH 10/100 16BIT 128PQFP
Manufacturer
Micrel Inc
Specifications of KS8842-16MQL
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
576-1458
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
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