IP175A LF
Preliminary Data Sheet
1/60
February 20, 2006
Copyright © 2004, IC Plus Corp.
IP175A LF-DS-R08
5 Port 10/100 Ethernet Integrated Switch
Features
General Description
5 port 10/100 Ethernet switch with built in
transceivers and memory
Build in SSRAM for frame buffer
Built in storage of 1K MAC address
Support flow control
–
Support IEEE802.3x for flow control for full
duplex mode operation
–
Support backpressure for flow control for
half duplex mode operation
5 port switching fabric
–
Support two-level hashing algorithm to
solve MAC address collision
–
Support MAC address aging
–
Store and forward mode
–
Broadcast storm protection
–
Full line speed capability of 148800 (14880)
packets/sec for 100M (10M)
–
Support 1536 byte data transfer for VLAN
packet traffic
–
Port base VLAN
–
Port base CoS configuration
Integrate 5 ports transceiver
–
Each port can be auto negotiable or forced
10M/100M, full/half duplex
–
Each port can be configured as 100BaseFX
–
Automatic MDI/MDI-X configuration
Support two MII, one SMI and extended MII
registers for router application
Built in regulator for 3.3v to 2.15v
LED status of Link, activity, Full/half duplex,
speed, and power on diagnostic function
Initial parameter setting by pin or EEPROM
(24LC01) configuration
Utilize single clock source (25Mhz)
0.25u technology
Support Lead Free package (Please refer to
the Order Information)
IP175A LF is a low cost 10/100 Ethernet single
chip switch. It integrates a 5-port switch controller,
SSRAM, and 5 10/100 Ethernet transceivers.
Each of the transceivers complies with the
IEEE802.3,
IEEE802.3u,
and
IEEE802.3x
specifications. The transceivers are designed in
DSP approach with 0.25um technology; they have
high noise immunity and robust performance.
IP175A LF operates in store and forward mode. It
supports flow control, auto MDI/MDI-X, CoS, port
base VLAN, and LED functions, etc. Each port can
be
configured
to
auto-negotiation
or
forced
10M/100M, full/half duplex, and it is also able to
configure to 100BaseFX transmission mode.
Using an EEPROM or pull up/down resistors on
specified pins can configure the desired options.
IP175A LF does not support “forced 10M half
mode”.
IP175A LF supports two MII ports for router
application, which supports 4 LAN ports and one
WAN port. MII0 is for LAN traffic and MII1 is for
WAN traffic and no external PHY is needed. Both
MII can work in PHY mode and interface to the
external MAC in this application. The external
MAC can monitor or configure IP175A LF by
accessing MII registers through SMI.
MII0 also can be configured to be MAC mode. It is
used to interface an external PHY to work as a
4+1 switch.
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