IP178C-DS-R04 datasheet(13/93 Pages) ETC2

13 / 93 page

IP178C/IP178C LF/IP178CH/IP178CH LF

Datasheet

IP178C/IP178CH applications: (continued)

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.

PHY

IP178C/

178CH

MAC0

MAC8

MAC7

switch engine

.....

(MAC8 is unused)

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.

MII/RMII

PHY

IP178C

/178CH

external

PHY

(MAC mode)

MAC0

MAC7

MAC8

switch engine

.....

June 21, 2007

13/93

IP178Cx-DS-R12

IP178C-DS-R04 数据表(PDF) 13 Page - List of Unclassifed Manufacturers

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