KSZ8895MQ/RQ/FMQ
Integrated 5-Port 10/100 Managed Ethernet
Switch with MII/RMII interface
Rev. 1.5
General Description
The KSZ8895MQ/RQ/FMQ is a highly-integrated,
Layer 2-managed, five-port switch with numerous
features designed to reduce system cost. Intended for
cost-sensitive 10/100Mbps five-port switch systems
with low power consumption, on-chip termination, and
internal core power controllers, it supports
high-performance memory bandwidth and shared
memory-based switch fabric with non-blocking
configuration. Its extensive feature set includes power
management, programmable rate limit and priority
ratio, tag/port-based VLAN, packets filtering,
four-queue QoS prioritization, management interfaces,
and MIB counters. The KSZ8895 family provides
multiple CPU data interfaces to effectively address
both current and emerging fast Ethernet applications
when port 5 is configured to separate MAC5 with
SW5-MII/RMII and PHY5 with P5-MII/RMII interfaces.
The KSZ8895 family offers three configurations,
providing the flexibility to meet different requirements:
KSZ8895MQ: Five 10/100Base-T/TX transceivers,
one SW5-MII and one P5-MII interface
KSZ8895RQ: Five 10/100Base-T/TX transceivers,
one SW5-RMII and one P5-RMII interface
KSZ8895FMQ: Three 10/100Base-T/TX
transceivers on Ports 1, 2, 5 and two 100Base-FX
transceivers on Ports 3, 4, one SW5-MII and one
P5-MII interface
All registers of MACs and PHYs units can be
managed by the SPI or the SMI interface. MIIM
registers can be accessed through the MDC/MDIO
interface. EEPROM can set all control registers for the
unmanaged mode.
Functional Diagram
Note: SW5 indicates the MAC5 of the switch side, P5 indicates the PHY5 of the Port 5.
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 •
http://www.micrel.com
March 2012
M9999-032612-1.5
MICREL [ MICREL SEMICONDUCTOR ]
