Datasheet Microchip KSZ8995 — 数据表

KS8995E Micrel KS8995E
5-Port 10/100 Integrated Switch with PHY and Frame Buffer
Rev. 1.10
On the media side, the KS8995E 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.
The major enhancements from the KS8995 to the KS8995E
are support for VLAN, traffic priority queuing, EEPROM
programming for expanded control, MDI/MDI-X auto crossover.
Data sheets and support documentation can be found on
Micrel’s web site at www.micrel.com. General Description
The KS8995E contains five 10/100 physical layer transceivers, five MAC (Media Access Control) units with an integrated
layer 2 switch. The device runs in two modes. The first mode
is a five port integrated switch and the second is as a five port
switch with the fifth port decoupled from the physical port. In
this mode access to the fifth MAC is provided using an MII
(Media Independent Interface).
Useful configurations include a stand alone five port switch as
well as a four port switch with a routing element connected to …

KS8995M Micrel, Inc. KS8995M
Integrated 5-Port 10/100 Managed Switch
Rev 1.13 General Description Features The KS8995M is a highly integrated Layer-2 managed switch
with optimized BOM (Bill of Materials) cost for low port count,
cost-sensitive 10/100Mbps switch systems. It also provides
an extensive feature set such as tag/port-based VLAN, QoS
(Quality of Service) priority, management, MIB counters, dual
MII interfaces and CPU control/data interfaces to effectively
address both current and emerging Fast Ethernet applications.
The KS8995M contains five 10/100 transceivers with patented mixed-signal low-power technology, five MAC (Media
Access Control) units, a high-speed non-blocking switch
fabric, a dedicated address look-up engine, and an on-chip
frame buffer memory.
All PHY units support 10BaseT and 100BaseTX. In addition,
two of the PHY units support 100BaseFX (Ports 4 and 5).
All support documentation can be found on Micrel’s web site
at: www.micrel.com. • Integrated switch with five MACs and five Fast Ethernet
transceivers fully compliant to IEEE 802.3u standard
• Shared memory based switch fabric with fully nonblocking configuration
• 1.4Gbps high-performance memory bandwidth
• 10BaseT, 100BaseTX and 100BaseFX modes (FX in
Ports 4 and 5)
• Dual MII configuration: MII-Switch (MAC or PHY mode …

KS8995MA/FQ
Integrated 5-Port 10/100 Managed Switch
Rev. 3.0 General Description
The KS8995MA/FQ is a highly-integrated Layer 2
managed switch with optimized bill of materials (BOM)
cost for low port count, cost-sensitive 10/100Mbps switch
systems with both copper and optic fiber media.
It also provides an extensive feature set such as tag/portbased VLAN, quality of service (QoS) priority,
management, MIB counters, dual MII interfaces and CPU
control/data interfaces to effectively address both current
and emerging fast Ethernet applications.
The KS8995MA/FQ contains five 10/100 transceivers with
patented mixed-signal low-power technology, five media
access control (MAC) units, a high-speed non-blocking
switch fabric, a dedicated address lookup engine, and an
on-chip frame buffer memory. All PHY units support 10BASE-T and 100BASE-TX.
In addition, two of the PHY units support 100BASE-FX on
ports 4 and 5 for KSZ8995MA, two of the PHY units
support 100BASE-FX on ports 3 and 4 for KSZ8995FQ.
Datasheets and support documentation can be found on
Micrel’s web site at: www.micrel.com. Functional Diagram Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com October 2011 M9999-102611-3.0 Micrel, Inc. KS8995MA/FQ Features
• Integrated switch with five MACs and five fast
Ethernet transceivers fully-compliant to IEEE 802.3u …

KS8995MA/FQ
Integrated 5-Port 10/100 Managed Switch
Rev. 3.0 General Description
The KS8995MA/FQ is a highly-integrated Layer 2
managed switch with optimized bill of materials (BOM)
cost for low port count, cost-sensitive 10/100Mbps switch
systems with both copper and optic fiber media.
It also provides an extensive feature set such as tag/portbased VLAN, quality of service (QoS) priority,
management, MIB counters, dual MII interfaces and CPU
control/data interfaces to effectively address both current
and emerging fast Ethernet applications.
The KS8995MA/FQ contains five 10/100 transceivers with
patented mixed-signal low-power technology, five media
access control (MAC) units, a high-speed non-blocking
switch fabric, a dedicated address lookup engine, and an
on-chip frame buffer memory. All PHY units support 10BASE-T and 100BASE-TX.
In addition, two of the PHY units support 100BASE-FX on
ports 4 and 5 for KSZ8995MA, two of the PHY units
support 100BASE-FX on ports 3 and 4 for KSZ8995FQ.
Datasheets and support documentation can be found on
Micrel’s web site at: www.micrel.com. Functional Diagram Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com December 2012 M9999-121212-3.0 Micrel, Inc. KS8995MA/FQ Features
• Integrated switch with five MACs and five fast
Ethernet transceivers fully-compliant to IEEE 802.3u …

KS8995X Micrel KS8995X
Integrated 5-Port 10/100 QoS Switch
Rev. 1.13 General Description Features The KS8995X is a highly integrated Layer-2 QoS (Quality of
Service) switch with optimized BOM (Bill of Materials) cost for
low port count, cost-sensitive 10/100Mbps switch systems. It
also provides an extensive feature set including three different QoS priority schemes, a dual MII interface for BOM cost
reduction, rate limiting to offload CPU tasks, software and
hardware power-down, a MDC/MDIO control interface and
port mirroring/monitoring to effectively address both current
and emerging Fast Ethernet applications.
The KS8995X contains five 10/100 transceivers with patented mixed-signal low-power technology, five MAC (Media
Access Control) units, a high-speed non-blocking switch
fabric, a dedicated address lookup engine, and an on-chip
frame buffer memory.
All PHY units support 10BaseT and 100BaseTX. In addition,
two of the PHY units support 100BaseFX (Ports 4 and 5).
All support documentation can be found on Micrel’s web site
at www.micrel.com. • Integrated switch with five MACs and five Fast Ethernet
transceivers fully compliant to IEEE 802.3u standard
• Shared memory based switch fabric with fully nonblocking configuration
• 10BaseT, 100BaseTX and 100BaseFX modes (FX in
Ports 4 and 5)
• Dual MII configuration: MII-Switch (MAC or PHY mode …

KS8995XA
Integrated 5-Port 10/100 QoS Switch
Rev 2.6 General Description
The KS8995XA is a highly integrated Layer-2 quality of
service (QoS) switch with optimized bill of materials
(BOM) cost for low port count, cost-sensitive
10/100Mbps switch systems. It also provides an
extensive feature set including three different QoS
priority schemes, a dual MII interface for BOM cost
reduction, rate limiting to offload CPU tasks, software
and hardware power-down, a MDC/MDIO control
interface and port mirroring/monitoring to effectively
address both current and emerging Fast Ethernet
applications. The KS8995XA contains five 10/100 transceivers with
patented mixed-signal low-power technology, five media
access control (MAC) units, a high-speed non-blocking
switch fabric, a dedicated address lookup engine, and
an on-chip frame buffer memory.
All PHY units support 10BASE-T and 100BASE-TX. In
addition, two of the PHY units support 100BaseFX
(Ports 4 and 5). Functional Diagram
10/100
T/Tx 1 10/100 …