DS33X81+ Maxim Integrated Products, DS33X81+ Datasheet - Page 91

• Manufacturer Part Number: DS33X81+
• Description: IC MAPPING ETHERNET 256CSBGA
• Manufacturer: Maxim Integrated Products

Specifications of DS33X81+

• Applications: Data Transport
• Interface: Parallel/Serial
• Voltage - Supply: 1.8V, 2.5V, 3.3V
• Package / Case: 256-CSBGA
• Mounting Type: Surface Mount
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

8.20.3.1GFP-F NULL
When configured for GFP Null operation, no additional header information is required. The Encapsulator’s Tag 1
Insertion function (in PP.ET1DHR and PP.ET1DLR) is available to insert a 4-byte MPLS tag immediately before the
Ethernet Destination Address (DA), and the Tag 2 Insertion function (in PP.ET2DHR and PP.ET2DLR) is available
to insert a 4-byte VLAN tag immediately after the Source Address (SA). Any existing VLAN tags are “pushed” lower
in the frame. The resulting encapsulated frame format is shown below. Note that when enabled in this mode, the
pFCS calculation begins with the 9
Figure 8-18. GFP-F NULL Encapsulated Frame Format
Rev: 063008
________________________________________________ DS33X162/X161/X82/X81/X42/X41/X11/W41/W11
Q-in-Q VLAN TAG (existing/optional)
MSB
GFP Payload FCS (optional)
GFP Payload Length (PLI)
Destination Address (DA)
2nd Octet of GFP tHEC
2nd Octet of GFP Type
1st Octet of GFP tHEC
1st Octet of GFP Type
Source Address (SA)
VLAN TAG (optional)
Length / EtherType
MAC Client Data
PAD (optional)
FCS for MAC
GFP cHEC
th
byte of the frame.
LSB
Bytes
46-1500
1
1
1
6
6
2
2
1
4
4
2
4
4
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