KS8997 Micrel Inc, KS8997 Datasheet - Page 4

• Manufacturer Part Number: KS8997
• Description: IC SWITCH 10/100 8PORT 128PQFP
• Manufacturer: Micrel Inc

Specifications of KS8997

• Applications: *
• Mounting Type: Surface Mount
• Package / Case: 128-MQFP, 128-PQFP
• Fiber Support: No
• 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 Temperature Classification: Commercial
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Contents
System Level Applications ................................................................................................................................................6
Pin Description ..................................................................................................................................................................7
I/O Grouping....................................................................................................................................................................11
I/O Descriptions...............................................................................................................................................................11
Pin Configuration.............................................................................................................................................................14
Functional Overview: Physical Layer Transceiver ..........................................................................................................15
Functional Overview: Switch Core ..................................................................................................................................17
Programmable Features .................................................................................................................................................19
VLAN Operation ..............................................................................................................................................................20
Station MAC Address (control frames only) ....................................................................................................................21
EEPROM Operation ........................................................................................................................................................21
February 2007
100BaseTX Transmit...................................................................................................................................................15
100BaseTX Receive....................................................................................................................................................15
PLL Clock Synthesizer ................................................................................................................................................15
Scrambler/De-Scrambler (100BaseTX only)...............................................................................................................15
10BaseT Transmit .......................................................................................................................................................15
10BaseT Receive ........................................................................................................................................................15
Power Management ....................................................................................................................................................15
MDI/MDI-X Auto Crossover.........................................................................................................................................16
Auto-Negotiation..........................................................................................................................................................16
Address Look-Up.........................................................................................................................................................17
Learning.......................................................................................................................................................................17
Migration......................................................................................................................................................................17
Aging ...........................................................................................................................................................................17
Forwarding...................................................................................................................................................................17
Switching Engine.........................................................................................................................................................17
MAC (Media Access Controller) Operation .................................................................................................................18
Priority Schemes .........................................................................................................................................................19
Per Port Method ..........................................................................................................................................................19
802.1p Method ............................................................................................................................................................19
IPv4 DSCP Method .....................................................................................................................................................19
Other Priority Considerations ......................................................................................................................................19
EEPROM Memory Map...............................................................................................................................................21
General Control Register.............................................................................................................................................21
Power Save Mode ..............................................................................................................................................15
Inter-Packet Gap (IPG) ......................................................................................................................................18
Backoff Algorithm ...............................................................................................................................................18
Late Collision......................................................................................................................................................18
Illegal Frames.....................................................................................................................................................18
Flow Control .......................................................................................................................................................18
Half-Duplex Back Pressure ................................................................................................................................18
Broadcast Storm Protection ...............................................................................................................................18
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M9999-022807-1.1