zl50407 Zarlink Semiconductor, zl50407 Datasheet - Page 79

• Manufacturer Part Number: zl50407
• Description: Lightly Managed/unmanaged 8-port 10/100m + 1-port 10/100/1000m Ethernet Switch
• Manufacturer: Zarlink Semiconductor

13.3.6.2
I
Accessed by CPU and I
13.3.6.3
I²C Address h069, CPU Address: 511
Accessed by CPU and I²C (R/W)
13.3.6.4
CPU Address: 512
Accessed by CPU (R/W)
2
C Address h068, CPU Address: 510
Bit [1]:
Bit [4:2]:
Bit [5]:
Bit [6]:
Bit [7]:
Bit [7:0]:
Bit [7:0]:
Bit [7:0]:
UCC – Unicast Congestion Control
MCC – Multicast Congestion Control
MCCTH – Multicast Threshold Control
Threshold on the multicast granule count. Exceeding the threshold consider as
multicast resource low and the new multicast will be dropped at B% or flow con-
trol is triggered if enabled. (Default: 0x3)
2
C (R/W)
Number of frame count. Used for best effort dropping at B% when destination
port’s best effort queue reaches UCC threshold and shared pool is all in use.
Granularity is 16 granule (Default 0x6)
In multiples of 16 granules (granularity). Used for triggering MC flow control
when destination port’s multicast best effort queue reaches MCC threshold.
(Default 0x6)
Enable RX rate control (on RMAC ports only)
1 – Enable
0 – Disable (Default)
Reserved
Select VLAN tag or TOS (IP packets) to be preferentially picked to map
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
Zarlink Semiconductor Inc.
ZL50407
79
Data Sheet