IP175C/IP175C LF/IP175CH/IP175CH LF
Data Sheet
86/111
Mar 09, 2007
Copyright © 2004, IC Plus Corp.
IP175C/IP175CH-DS-R14
Switch control register 3
PHY
MII
ROM
R/W
Description
Default
11[15:14] 59[7:6]
R/W BF_STM_THR_SEL[1:0].
Broadcast storm threshold selection
00: 159 packets/10ms for 100Mbps port, or 159 packets/100ms
for 10Mbps port,
01: 127 packets/10ms for 100Mbps port, or 127 packets/100ms
for 10Mbps port,
10: 63 packets/10ms for 100Mbps port, or 63 packets/100ms
for 10Mbps port,
11: 31 packets/10ms for 100Mbps port, or 31 packets/100ms
for 10Mbps port,
2’b00
11[13:12] 59[5:4]
R/W The default value should be adopted for normal operation.
2’b00
11[11:10] 59[3:2]
R/W The default value should be adopted for normal operation.
2’b00
11[9:8]
59[1:0]
R/W UNIT_LOW_THR_SEL[1:0]
The default value should be adopted for normal operation.
2’b00
11[7:6]
58[7:6]
R/W UNIT_HIGH_THR_SEL[1;0].
The default value should be adopted for normal operation.
2’b00
11.5
58.5
R/W BF_STM_EN_QM
The default value should be adopted for normal operation.
1’b0
11.4
58.4
R/W PREDROP_EN
1: Drop an incoming broadcast packet if any port is congested.
0: forward an incoming broadcast packet to un-congested ports
instead of congested ports.
1’b0
11[3:2]
58[3:2]
R/W PKT_LOW_THR_SEL[1:0].
The default value should be adopted for normal operation.
2’b00
30
11[1:0]
58[1:0]
R/W PKT_HIGH_THR_SEL[1:0].
The default value should be adopted for normal operation.
2’b00
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