zl50404 Zarlink Semiconductor, zl50404 Datasheet - Page 80

• Manufacturer Part Number: zl50404
• Description: Lightly Managed/unmanaged 5-port 10/100m Ethernet Switch
• Manufacturer: Zarlink Semiconductor

13.3.6.8
I²C Address h074, CPU Address 518
Accessed by CPU and I²C (R/W)
13.3.6.9
I²C Address h075, CPU Address 519
Accessed by CPU and I²C (R/W)
Buffer reservation for class 1. Granularity 16 granules. (Default 0)
13.3.6.10
I²C Address h076, CPU Address 51A
Accessed by CPU and I²C (R/W)
Buffer reservation for class 2. Granularity 16 granules. (Default 0)
13.3.6.11
I²C Address h077, CPU Address 51B
Accessed by CPU and I²C (R/W)
Buffer reservation for class 3. Granularity 16 granules. (Default 0)
13.3.6.12
I²C Address h056; CPU Address:h530
Accessed by CPU and I²C (R/W)
Registers AVPML, AVPMM, and AVPMH allow the eight VLAN Tag priorities to map into eight Internal level
transmit priorities. Under the Internal transmit priority, seven is the highest priority where as zero is the lowest. This
feature allows the user the flexibility of redefining the VLAN priority field. For example, programming a value of 7
into bit 2:0 of the AVPML register would map packet VLAN priority 0 into Internal transmit priority 7. The new priority
is used inside the ZL50404. When the packet goes out it carries the original priority.
Bits [7:0]:
Bits [7:0]:
Bits [7:0]:
Bits [7:0]:
Bit [2:0]:
Bit [5:3]:
Bit [7:6]:
SFCB – Share FCB Size
C1RS – Class 1 Reserve Size
C3RS – Class 3 Reserve Size
C2RS – Class 2 Reserve Size
AVPML – VLAN Tag Priority Map
Expressed in multiples of 16 granules. Buffer reservation for shared pool.
Class 1 FCB Reservation
Class 2 FCB Reservation
Class 3 FCB Reservation
Priority when the VLAN tag priority field is 0 (Default 0)
Priority when the VLAN tag priority field is 1 (Default 0)
Priority when the VLAN tag priority field is 2 (Default 0)
Zarlink Semiconductor Inc.
ZL50404
80
Data Sheet