Features: · Support 1k MAC address
· 512k bits packet buffer memory
· 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 MAC address
· Support one MII/RMII port, which works at 100 Mbps full duplex for router application
· Support port base VLAN & tag VLAN
· Support CoS
· Support SMART MAC function
· Support spanning tree protocol
· Support max forwarding packet length 1552/ 1536 bytes option
· Support 8-level bandwidth control
· Support SCA
· Support two fiber ports with far end fault function for IP178CH only
· Built in linear regulator control circuit
· Support Lead Free package (Please refer to the Order Information)Application` An 8-port switch application
- If pin 53 EXTMII_EN is pulled low, then MII/ RMII interface is disabled. IP178C/IP178CH is not connected to a CPU and works as an 8-port switch. The ninth switch port MAC8 is unused in this application.
` A 9-port switch application
- If pin 53 EXTMII_EN is pulled high, then MII/ RMII interface is enabled. The ninth switch port MAC8 is connected to a PHY through the MII/RMII interface. IP178C/IP178CH works as a 9-port switch. Because IP178C/IP178CH doesn't access the MII register of the external PHY through SMI, MII/RMII interface should be MAC mode and full duplex in this application.
` An 8-port router application
- IF pin 53 EXTMII_EN is pulled high, then MII/RMII interface is enabled. IP178C/IP178CH is connected to a CPU through MII/ RMII interface. IP178C/IP178CH works as an 8-port router. MII/RMII interface is set to be PHY mode and 100 Mbps full duplex in this application.
Pinout
SpecificationsSupply Voltage .....................................0.3V to 4.0V
Input Voltage .......................................0.3V to 5.0V
Output Voltage ....................................0.3V to 5.0V
Storage Temperature .......................-65°C to 150°C
Ambient Operating Temperature (Ta) ....0°C to 70°C
DescriptionIP178CHLF integrates a 9-port switch controller, SSRAM, and 8 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 in 0.18um technology; they have high noise immunity and robust performance.
IP178CHLF 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 duplex mode. Using an EEPROM or pull up/down resistors on specific pins can configure the desired options.
Besides an 8-port switch application, IP178CHLF 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/IP178CH 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.
IP178CHLF Data Sheet
