KSZ8895MQ_12 MICREL [Micrel Semiconductor], KSZ8895MQ_12 Datasheet - Page 4

• Manufacturer Part Number: KSZ8895MQ_12
• Description: Integrated 5-Port 10/100 Managed Ethernet Switch with MII/RMII interface
• Manufacturer: MICREL [Micrel Semiconductor]

Micrel, Inc.
Contents
Pin Configuration ..........................................................................................................................................................13
Pin Description ..............................................................................................................................................................14
Pin for Strap-in Options................................................................................................................................................21
Introduction ...................................................................................................................................................................24
Functional Overview: Physical Layer Transceiver ....................................................................................................24
Functional Overview: Power Management.................................................................................................................29
Functional Overview: Switch Core ..............................................................................................................................30
March 2012
100BASE-TX Transmit ...............................................................................................................................................24
100BASE-TX Receive ................................................................................................................................................24
PLL Clock Synthesizer................................................................................................................................................25
Scrambler/Descrambler (100BASE-TX only) .............................................................................................................25
100BASE-FX Operation..............................................................................................................................................25
100BASE-FX Signal Detection ...................................................................................................................................25
100BASE-FX Far End Fault........................................................................................................................................25
10BASE-T Transmit ....................................................................................................................................................25
10BASE-T Receive .....................................................................................................................................................25
MDI/MDI-X Auto Crossover ........................................................................................................................................25
Auto-Negotiation .........................................................................................................................................................27
On-chip Termination Resistors ...................................................................................................................................29
Internal 1.2V LDO Controller ......................................................................................................................................29
Normal Operation Mode .............................................................................................................................................29
Energy Detect Mode ...................................................................................................................................................30
Soft Power Down Mode ..............................................................................................................................................30
Power Saving Mode....................................................................................................................................................30
Port-based Power Down Mode...................................................................................................................................30
Address Look-Up ........................................................................................................................................................30
Learning ......................................................................................................................................................................30
Migration .....................................................................................................................................................................31
Aging...........................................................................................................................................................................31
Forwarding ..................................................................................................................................................................31
Switching Engine ........................................................................................................................................................31
Media Access Controller (MAC) Operation ................................................................................................................31
MII Interface Operation ...............................................................................................................................................36
Port 5 PHY 5 P5-MII/RMII Interface............................................................................................................................36
Straight Cable .........................................................................................................................................................26
Crossover Cable .....................................................................................................................................................27
Inter-Packet Gap (IPG) ...........................................................................................................................................31
Backoff Algorithm....................................................................................................................................................31
Late Collision ..........................................................................................................................................................31
Illegal Frames .........................................................................................................................................................31
Flow Control............................................................................................................................................................32
Half-Duplex Back Pressure ....................................................................................................................................35
Broadcast Storm Protection....................................................................................................................................35
4
KSZ8895MQ/RQ/FMQ
M9999-032612-1.5