Preliminary Data Sheet
8 Port 10/100 Ethernet Integrated Switch
Support 1k MAC address
Support auto-polarity for 10 Mbps
Support filter/ forward special DA option
Support broadcast storm protection
Auto MDI-MDIX option
Support port security option to lock the first
Support one MII/RMII port, which works at 100
Mbps full duplex for router application
Support port base VLAN & tag VLAN
Support SMART MAC function
Support spanning tree protocol
Support max forwarding packet length 1552/
1536 bytes option
Support 8-level bandwidth control
Built in linear regulator control circuit
Support Lead Free package (Please refer to
the Order Information)
Note – some features need CPU support, please
refer to the detail description inside this data sheet
IP178C integrates a 9-port switch controller,
SSRAM, and 8 10/100 Ethernet transceivers.
Each of the transceivers complies with the
specifications. The transceivers are designed in
DSP approach in 0.18um technology; they have
high noise immunity and robust performance.
IP178C operates in store and forward mode. It
supports flow control, auto MDI/MDI-X, CoS, port
base VLAN, bandwidth control, DiffServ, SMART
MAC and LED functions, etc. Each port can be
configured as auto-negotiation or forced 10
Mbps/100 Mbps, full/half duplexmode. Using an
EEPROM or pull up/down resistors on specific
pins can configure the desired options.
Besides an 8-port switch application, IP178C
supports one MII/RMII ports for router application,
which supports 7 LAN ports and one WAN port.
The external MAC can monitor or configure
IP178C by accessing MII registers through SMI.
MII/RMII port also can be configured to be MAC
mode. It is used to interface an external PHY to
work as an 8+1 switch.
Copyright © 2004, IC Plus Corp.
October 27, 2005