Single-Chip Ethernet Controller with HP Auto-MDIX Support and PCI Interface

Datasheet

Example frame configurations:

p

r

DST SRCL3 Packet o

t

0 1 2 3

Calculate Checksum

Figure 3.20 Type II Ethernet Frame

 

 

 

8

V

t

 

DST

 

SRC

1

I

y

L3 Packet

 

 

 

0

D p

 

 

 

 

0

 

e

 

0

1

2

3

 

4

 

Calculate Checksum

Figure 3.21 Ethernet Frame with VLAN Tag

{DSAP, SSAP, CTRL, OUI[23:16]}

{OUI[15:0], PID[15:0]}

 

S

S

 

L

N

N

 

DST SRC e

A

A

L3 Packet

n

P

P

 

 

0

1

 

0 1 2 3 4 5

Calculate Checksum

F

C

S

F

C

S

F

C

S

Figure 3.22 Ethernet Frame with Length Field and SNAP Header

SMSC LAN9420/LAN9420i

61

Revision 1.22 (09-25-08)

 

DATASHEET