zl50404 Zarlink Semiconductor, zl50404 Datasheet - Page 32

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

5.8
Figure 7 shows the ZL50404 priority classification rule.
5.9
An administrator can use the PVMAP Registers to configure the ZL50404 for port-based VLAN (see “Register
Definition” on page 52). For example, ports 1-3 might be assigned to the Marketing VLAN, ports 4-6 to the
Engineering VLAN, and ports 7-9 to the Administrative VLAN. The ZL50404 determines the VLAN membership of
each packet by noting the port on which it arrives. From there, the ZL50404 determines which outgoing port(s)
is/are eligible to transmit each packet, or whether the packet should be discarded.
Port Registers
Register for Port #0
PVMAP00_0[7:0] to PVMAP00_1[1:0]
Register for Port #1
PVMAP01_0[7:0] to PVMAP01_1[1:0]
Register for Port #2
PVMAP02_0[7:0] to PVMAP02_1[1:0]
…
Register for Port #9
PVMAP09_0[7:0] to PVMAP09_1[1:0]
Priority Classification Rule
Port Based VLAN
Use VLAN
priority
Yes
TOS Precedence over VLAN?
Use Default port settings
(QOSC Register bit 5)
Fix Port Priority?
Table 6 - Port-Based VLAN Mapping
Figure 7 - Priority Classification Rule
VLAN Tag?
IP Frame?
No
No
No
No
Zarlink Semiconductor Inc.
ZL50404
Yes
32
Yes
No
9
0
0
0
0
Yes
Destination Port Numbers Bit Map
Use Default port settings
Use logical port
Use Logical Port?
IP Frame?
…
Yes
Yes
2
1
1
0
0
No
1
1
0
0
0
Use TOS
Data Sheet
0
0
1
0
0