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Single-Chip Ethernet Controller with HP Auto-MDIX Support and PCI Interface
Datasheet
Revision 1.22 (09-25-08) 40 SMSC LAN9420/LAN9420i
DATASHEET
Figure 3.15 Ring and Chain Descriptor Structures
DESCRIPTOR 0
BUFFER 1
BUFFER 2
DESCRIPTOR 1
BUFFER 1
BUFFER 2
DESCRIPTOR n
BUFFER 1
BUFFER 2
Ring Structure:
DESCRIPTOR 0
BUFFER 1
DESCRIPTOR 1
BUFFER 1
NEXT DESCRIPTOR
Chain Structure: