DS33X11+ Maxim Integrated Products, DS33X11+ Datasheet - Page 49

• Manufacturer Part Number: DS33X11+
• Description: IC MAPPING ETHERNET 144CSBGA
• Manufacturer: Maxim Integrated Products

Specifications of DS33X11+

• Applications: Data Transport
• Interface: SPI
• Voltage - Supply: 1.8V, 2.5V, 3.3V
• Package / Case: 144-CSBGA
• Mounting Type: Surface Mount
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

The user may choose to disable unused features in a forwarding mode. In the forwarding modes with Priority
Forwarding or Priority Scheduling, both 802.1p VLAN PCP and DSCP are supported. The user-programmable
Priority Table is accessed through the SU.PTC, SU.PTAA, SU.PTWD, SU.PTRD, and SU.PTSA registers. The
Priority and Quality of Service (QoS) features of the device are discussed further in Section 8.16. Gigabit Ethernet
applications may only use Forwarding modes that support 1 Ethernet Port (modes 1, 2, or 3). In all forwarding
modes, VCAT/LCAS can be used to aggregate multiple physical serial ports for each WAN Group’s data stream,
except on the devices in the product family that do not support VCAT/LCAS. More information on the use of
VCAT/LCAS for link aggregation can be found in Section 8.12.
In the forwarding modes that use VLAN VID tags, the device references a user-programmable lookup table to
make forwarding decisions. Through the SU.VTC, SU.VTAA, SU.VTWD, and SU.VTRD registers, the user must
program a lookup table that maps up to 4096 VLAN VID tags each to one of the four WAN Groups in the LAN-to-
WAN direction, and from the WAN Groups to the two Ethernet Interfaces in the WAN-to-LAN direction. More
information on VLAN mapping can be found in Section 8.16. Within each WAN Queue group, 802.1p VLAN Priority
coding or DSCP Priority Coding can be used to assign traffic to 4 different priority queues. More information on
priority forwarding and scheduling for quality of service can be found in Section 8.16.
Table 8-4. Forwarding Modes Supported by Device
8.9.2
Each Serial (WAN) Interface is mapped to a WAN Group through the VCAT.TCR3(1-16) and VCAT.RCR4(1-16)
registers. A WAN interface can only be assigned to one WAN Group. In devices in the product family that support
VCAT operation, if enabled, more than one WAN interface can be assigned to a WAN Group. Whenever a WAN
Group has more than one member, VCAT must be enabled for that group. A VCAT enabled WAN Group can
include up to 16 WAN Interfaces. More information on the use of VCAT/LCAS for link aggregation can be found in
Section 8.12.
Rev: 063008
________________________________________________ DS33X162/X161/X82/X81/X42/X41/X11/W41/W11
Forwarding
Mode
WAN Connections
1
2
3
4
5
DS33X161
DS33W11
DS33X81
DS33X41
DS33X11
Yes
No
No
No
No
DS33W41
Yes
Yes
Yes
No
No
DS33X42
Yes
Yes
Yes
Yes
No
DS33X162
DS33X82
Yes
Yes
Yes
Yes
Yes
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