DS33X11+ Maxim Integrated Products, DS33X11+ Datasheet - Page 98

• 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

8.20.6 cHDLC Encoding And Decoding
The cHDLC protocol provides a simple method for encapsulating Ethernet Frames over point-to-point serial links.
A Line Header Insertion function (in PP.ELHHR and PP.ELHLR) allows the user to insert Address, Control, and
Protocol bytes. The Tag 1 Insertion function (in PP.ET1DHR and PP.ET1DLR) allows the user to insert a 4-byte
MPLS tag immediately before the Destination Address (DA). The Tag 2 Insertion function (in PP.ET2DHR and
PP.ET2DLR) allows the user to insert a 4-byte VLAN tag immediately after the Source Address (SA). Any existing
VLAN tags are “pushed” lower in the frame.
Figure 8-22. cHDLC Encapsulated Frame Format
Rev: 063008
________________________________________________ DS33X162/X161/X82/X81/X42/X41/X11/W41/W11
Q-in-Q VLAN TAG (existing/optional)
MSB
Destination Address (DA)
2nd Octet of Protocol
Source Address (SA)
MPLS TAG (optional)
1st Octet of Protocol
VLAN TAG (optional)
Length / EtherType
MAC Client Data
Address (0x0F)
PAD (optional)
FCS (optional)
Control (0x00)
FCS for MAC
Flag(0x7E)
Flag(0x7E)
LSB
Bytes
46-1500
1
1
1
6
6
1
1
4
4
4
2
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4
1
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