zl50400 Zarlink Semiconductor, zl50400 Datasheet - Page 86

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

12.3.6.21
I²C Address h0BB, CPU Address 558
Accessed by CPU and I²C (R/W)
User Defined Logical Ports and Well Known Ports
The ZL50400 supports classifying packet priority through layer 4 logical port information. It can be setup by 8 Well
Known Ports, 8 User Defined Logical Ports, and 1 User Defined Range. The 8 Well Known Ports supported are:
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Their
WELL_KNOWN_PORT[_ENABLE can individually turn on/off each Well Known Port if desired.
Similarly, the User Defined Logical Port provides the user programmability to the priority, plus the flexibility to select
specific logical ports to fit the applications. The 8 User Logical Ports can be programmed via User_Port 0-7
registers. Two registers are required to be programmed for the logical port number. The respective priority can be
programmed to the User_Port [7:0] priority register. The port priority can be individually enabled/disabled via
User_Port_Enable register.
The User Defined Range provides a range of logical port numbers with the same priority level. Programming is
similar to the User Defined Logical Port. Instead of programming a fixed port number, an upper and lower limit need
to be programmed, they are: {RHIGHH, RHIGHL} and {RLOWH, RLOWL} respectively. If the value in the upper limit
is smaller or equal to the lower limit, the function is disabled. Any IP packet with a logical port that is less than the
upper limit and more than the lower limit will use the priority specified in RPRIORITY.
23
512
6000
443
111
22555
22
554
respective
Bit [0]:
Bit [1]:
Bit [2]:
Bit [3]:
Bit [4]:
Bit [5]:
Bit [6]:
Bit [7]:
USER_PROTOCOL_FORCE_DISCARD – User Define Protocol 0~7 Force Discard
priority
Enable Protocol 0 Force Discard
1 – Enable
0 – Disable
Enable Protocol 1 Force Discard
Enable Protocol 2 Force Discard
Enable Protocol 3 Force Discard
Enable Protocol 4 Force Discard
Enable Protocol 5 Force Discard
Enable Protocol 6 Force Discard
Enable Protocol 7 Force Discard
can
be
programmed
Zarlink Semiconductor Inc.
ZL50400
86
via
WELL_KNOWN_PORT[7:0]_PRIORITY
Data Sheet
register.