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IP178C/IP178C LF/IP178CH/IP178CH LF
Datasheet
34/93
June 21, 2007
Copyright © 2004, IC Plus Corp.
IP178Cx-DS-R12
2.3
Port locking
IP178C/IP178CH supports port locking. Each port can be configured individually by programming MII
register 30.31[8:0] or EEPROM 63[0] and 62[7:0]. User has to reset IP178C/IP178CH by writing
16’h55AA to MII register 30.0 after enabling this function. IP178C/IP178CH locks first MAC address if the
function is enabled. Any packet with MAC address not equal to the locked one will be dropped.
User has to turn off aging function when using the port locking function. Aging function can be disabled
by pulling low pin 76 AGING or programming register 30.1[3:2].
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