zl50400 Zarlink Semiconductor, zl50400 Datasheet - Page 80

• Manufacturer Part Number: zl50400
• Description: Lightly Managed/unmanaged 9-port 10/100 M Ethernet Switch
• Manufacturer: Zarlink Semiconductor

12.3.6
12.3.6.1
I²C Address h04B; CPU Address:h500
Accessed by CPU and I
(Group 5 Address) Buffer Control/QOS Group
Bit [0]:
Bit [1]:
Bits [4:2]:
Bit [5]:
Bit [6]:
Bit [7]:
Bit [2]:
Bit [3]:
Bit [4]:
Bit [5]
Bit [6]:
Bit [7]:
QOSC – QOS Control
2
C (R/W)
Delete MAC report control
0 – Report MAC address deletion (MAC address is deleted from MCT after
aging time) (Default)
1 – Disable report MAC address deletion
Delete Control
0 – MAC address entry is removed when it is old enough to be aged (Default)
1 – Disable aging logic from removing MAC during aging
However, a report is still sent to the CPU in both cases, when bit [2] = 0
Reserved. Must be 0.
ARP report control
0 - No ARP packet reporting (Default)
1 - Report ARP packet to CPU
Disable MCT speed-up aging
0 – Enable speed-up aging when MCT resource is low. (Default)
1 – Disable speed-up aging when MCT resource is low.
Slow Learning
0 – Learning is performed independent of search demand (Default)
1 – Enable slow learning. Learning is temporary disabled when search
demand is high
0 – Disable (Default)
1 – Enable
0 – Disable (Default)
1 – Enable
Reserved
transmit priority and drop priority
0 – Select VLAN Tag priority field over TOS (Default)
1 – Select TOS over VLAN tag priority field
Select TOS bits for Priority
0 – Use TOS [4:2] bits to map the transmit priority (Default)
1 – Use TOS [7:5] bits to map the transmit priority
Select TOS bits for Drop priority
0 – Use TOS [4:2] bits to map the drop priority (Default)
1 – Use TOS [7:5] bits to map the drop priority
Enable TX rate control (on RMAC ports only)
Enable RX rate control (on RMAC ports only)
Select VLAN tag or TOS (IP packets) to be preferentially picked to map
Zarlink Semiconductor Inc.
ZL50400
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Data Sheet