KSZ8895 Datasheet, PDF (4/115 Pages) Infineon Technologies AG – Integrated 5-Port 10/100 Managed Ethernet Switch with MII/RMII interface

Micrel, Inc.
KSZ8895MQ/RQ/FMQ
Contents
Pin Configuration ..........................................................................................................................................................13
Pin Configuration ..........................................................................................................................................................13
Pin Description ..............................................................................................................................................................14
Pin for Strap-in Options................................................................................................................................................22
Introduction ...................................................................................................................................................................25
Functional Overview: Physical Layer Transceiver ....................................................................................................25
100BASE-TX Transmit ...............................................................................................................................................25
100BASE-TX Receive ................................................................................................................................................25
PLL Clock Synthesizer................................................................................................................................................26
Scrambler/De-Scrambler (100BASE-TX only)............................................................................................................26
100BASE-FX Operation..............................................................................................................................................26
100BASE-FX Signal Detection ...................................................................................................................................26
100BASE-FX far End fault ..........................................................................................................................................26
10BASE-T Transmit....................................................................................................................................................26
10BASE-T Receive .....................................................................................................................................................26
MDI/MDI-X Auto Crossover ........................................................................................................................................26
Straight Cable .........................................................................................................................................................27
Crossover Cable .....................................................................................................................................................28
Auto-Negotiation .........................................................................................................................................................28
On-chip Termination Resistors ...................................................................................................................................30
Internal 1.2V LDO Controller ......................................................................................................................................30
Functional Overview: Power Management .................................................................................................................30
Normal Operation Mode .............................................................................................................................................30
Energy Detect Mode ...................................................................................................................................................31
Soft Power Down Mode ..............................................................................................................................................31
Power Saving Mode....................................................................................................................................................31
Port based Power Down Mode ...................................................................................................................................31
Functional Overview: Switch Core ..............................................................................................................................31
Address Look-Up ........................................................................................................................................................31
Learning ......................................................................................................................................................................31
Migration .....................................................................................................................................................................32
Aging ...........................................................................................................................................................................32
Forwarding ..................................................................................................................................................................32
Switching Engine ........................................................................................................................................................32
Media Access Controller (MAC) Operation ................................................................................................................32
Inter-Packet Gap (IPG) ...........................................................................................................................................32
Backoff Algorithm....................................................................................................................................................32
Late Collision ..........................................................................................................................................................32
Illegal Frames .........................................................................................................................................................32
Flow Control............................................................................................................................................................33
Half-Duplex Back Pressure ....................................................................................................................................36
Broadcast Storm Protection....................................................................................................................................36
MII Interface Operation ...............................................................................................................................................37
January 2011
4
M9999-012011-1.2