DM8203
2-port switch with MII / RMII Interface
6.15 Bandwidth Control Setting Register (67H)
Bit
7:4
Name
BSTH
Default
Description
PE0,RW Broadcast Storm Threshold
These bits define the bandwidth threshold that received broadcast packets over
the threshold are discarded
0000: no broadcast storm control
0001: 8K packets/sec
0010: 16K packets/sec
0011: 64K packets/sec
0100: 5%
0101: 10%
0110: 20%
0111: 30%
1000: 40%
1001: 50%
1010: 60%
1011: 70%
1100: 80%
1101: 90%
111X: no broadcast storm control
3:0
BW CTRL
PE0,RW Received and Transmitted Bandwidth Control
These bits define the bandwidth threshold that transmitted or received packets
over the threshold are discarded
0000: none
0001: 64Kbps
0010: 128Kbps
0011: 256Kbps
0100: 512Kbps
0101: 1Mbps
0110: 2Mbps
0111: 4Mbps
1000: 8Mbps
1001: 16Mbps
1010: 32Mbps
1011: 48Mbps
1100: 64Mbps
1101: 72Mbps
1110: 80Mbps
1111: 88Mbps
6.16 Per Port Block Unicast ports Control Register (68H)
Bit
7:4
3:0
Name
RESERVED
BLK_UP
Default
PH0,RW Reserved
PH0,RW Ports of Unicast Packet Be Blocked
Description
The received unicast packets are not forward to the assigned ports.
Note that the assigned port definition: bit 0 for port 0, bit 1 for port 1,
Preliminarydatasheet
DM8203-15-DS-P05
October 23, 2008
21
DAVICOM [ DAVICOM SEMICONDUCTOR, INC. ]
