Datasheet Microchip KSZ8993

KSZ8993M
Integrated 3-Port 10/100 Managed Switch with PHYs
Features
• 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 Ensures 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 …

KS8993 Micrel KS8993
3-Port 10/100 Integrated Switch with PHY and Frame Buffer
Rev. 2.05
The KS8993 has rich features such as VLAN and priority
queuing and is designed to reside in an unmanaged design
not requiring processor intervention. This is achieved through
I/O strapping at system reset time.
On the media side, the KS8993 supports 10BaseT,
100BaseTX and 100BaseFX as specified by the IEEE 802.3
committee.
Physical signal transmission and reception are enhanced
through use of analog circuitry that makes the design more
efficient and allows for lower power consumption and smaller
chip die size.
Data sheets and support documentation can be found on
Micrel’s web site at www.micrel.com. General Description
The KS8993 contains three 10/100 physical layer transceivers, three MAC (Media Access Control) units with an integrated layer 2 switch. The device runs in two modes. The first
mode is a three port integrated switch and the second is as
a three port switch with the third port decoupled from the
physical port. In this mode access to the third MAC is provided
using a reverse or forward MII (Media Independent Interface)
such that an external MAC can be directly connected to the
KS8993. This interface also supports the 7-wire (serial network interface) as used by some routing devices. …

KSZ8993M/ML
Integrated 3-Port 10/100 Managed
Switch with PHYs
Rev 1.06 General Description
The KSZ8993M contains two 10/100 transceivers
with patented mixed-signal low-power technology,
three media access control (MAC) units, a highspeed non-blocking switch fabric, a dedicated
address lookup engine, and an on-chip frame buffer
memory. The KSZ8993M, a highly integrated Layer 2
managed switch, is designed for low port count,
cost-sensitive 10/100 Mbps switch systems. It offers
an extensive feature set that includes tag/port-based
VLAN,
quality
of
service
(QoS)
priority,
management, management information base (MIB)
counters, MII/SNI, and CPU control/data interfaces
to effectively address both current and emerging
Fast Ethernet applications. Both PHY units support 10BASE-T and 100BASETX. In addition, one of the PHY unit supports
100BASE-FX. …