Micrel, Inc.
KSZ8993M/ML
1KLook-Up
Engine
AUTO
MDI/MDI-X
10/100
T/TX/FX
PHY 1
10/100
MAC1
Queue
Manageme
nt
FIF
O,Flow Control, VLANTagging,Priority
AUTO
MDI/MDI-X
10/100
T/TX
PHY 2
10/100
MAC2
Buffer
Manageme
nt
MII/SNI
10/100
MAC3
Frame
Buffers
SNI
SPI
SPI
MIB
Counters
MIIM
SMI
I2C
P1 LED[3:0]
P2 LED[3:0]
Control
Registers
EEP
ROM
Interface
LED
Drivers
Strap-In
Configuration Pins
Features
•
Proven Integrated 3-Port 10/100 Ethernet Switch
– 2nd generation switch with three MACs and two
PHYs fully compliant to IEEE 802.3u standard
– Non-blocking switch fabric assures fast packet
delivery by utilizing a 1K MAC address lookup table
and a store-and-forward architecture
– Full duplex IEEE 802.3x flow control (pause) with
force mode option
– Half-duplex back pressure flow control
– Automatic MDI/MDI-X crossover with disable and
enable option
– 100BASE-FX support on port 1
– MII interface supports both MAC mode and PHY
mode
– 7-wire serial network interface (SNI) support for
legacy MAC
– Comprehensive LED Indicator support for link,
activity, full/half duplex and 10/100 speed
•
Comprehensive Configuration Register Access
– Serial management interface (SMI) to all internal
registers
– MII management (MIIM) interface to PHY registers
– SPI and I
2
C Interface to all internal registers
– I/0 Pins strapping and EEPROM to program
selective registers in unmanaged switch mode
– Control registers configurable on the fly (port-
priority, 802.1p/d/q, AN…)
•
QoS/CoS Packet Prioritization Support
– Per port, 802.1p and DiffServ-based
– Re-mapping of 802.1p priority field per port basis
•
Advanced Switch Features
– IEEE 802.1q VLAN support for up to 16 groups
(full-range of VLAN ID)
– VLAN ID tag/untag options, per port basis
– IEEE 802.1p/q tag insertion or removal on a per
port basis (egress)
– Programmable rate limiting from 0Mbps to
100Mbps at the ingress and egress port, rate options
for high and low priority per port basis
– Broadcast storm protection with % control (global
and per port basis)
– IEEE 802.1d spanning tree protocol support
– Upstream special tagging mode to inform the
processor which ingress port receives the packet
– IGMP v1/v2 snooping support for multicast packet
filtering
– Double-tagging support
October 2008
2
M9999-020606
MICREL [ MICREL SEMICONDUCTOR ]
