MDS105 Datasheet, PDF (17/35 Pages) Zarlink Semiconductor Inc – Unmanaged 5-Port 10/100 Mbps Ethernet Switch

MDS105
11.11 AVDM – VLAN Discard Map
• Access: parallel interface and I²C, Read/Write
• Address: h07
Map VLAN tag into frame discard levels (0 = low drop, 1 = high drop).
Bit 0
Frame discard for tag value 0
(Default 0)
Bit 1
Frame discard for tag value 1
(Default 0)
Bit 2
Frame discard for tag value 2
(Default 0)
Bit 3
Frame discard for tag value 3
(Default 0)
Bit 4
Frame discard for tag value 4
(Default 0)
Bit 5
Frame discard for tag value 5
(Default 0)
Bit 6
Frame discard for tag value 6
(Default 0)
Bit 7
Frame discard for tag value 7
(Default 0)
11.12 TOSPM – TOS Priority Map
• Access: parallel interface and I²C, Read/Write
• Address: h08
Map TOS field in IP packet into 2 transmit queues (0 = low priority, 1 = high priority).
Bit 0
Bit 1
Mapped priority when TOS is 0
Mapped priority when TOS is 1¹
(Default 0)
(Default 0)
Bit 2
Mapped priority when TOS is 2
(Default 0)
Bit 3
Mapped priority when TOS is 3
(Default 0)
Bit 4
Mapped priority when TOS is 4
(Default 0)
Bit 5
Mapped priority when TOS is 5
(Default 0)
Bit 6
Mapped priority when TOS is 6
(Default 0)
Bit 7
Mapped priority when TOS is 7
(Default 0)
1. TOS = 1 means the appropriate 3 bit TOS subfield is “001.
11.13 PTPRI – Port Priority
• Access: parallel interface and I²C, Read/Write
• Address: h09
Enable and configure port-based priorities for Ports 0, and 1
Bit 0
EN0
Port 0: Enable; 1 = enabled
Bit 1
P0
Port 0: Priority; 1 = high, 0 = low
Bit 2
EN1
Port 1: Enable; 1 = enabled
Bit 3
P0
Port 1: Priority; 1 = high, 0 = low
Bit 7:4
Reserved
(Default 0)
(Default 0)
(Default 0)
(Default 0)
Data Sheet
17
Zarlink Semiconductor Inc.